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  • Installing gtk and compiling using gcc under windows?

    - by sil3nt
    I have gcc installed in c:/programfiles (also set as a path variable), and i have all the necessary files for gtk from http://www.gtk.org/download-windows.html, glib,gtk,pango,atk and cairo. Although I have no clue as to how to compile a c program using gtk with the gcc compiler. How do I set everything up so that it works?. (I don't know where each zip file goes.?) basically I don't really know where start.

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  • Precompiled headers with GCC

    - by Lee Baldwin
    Anyone had any success getting precompiled headers working with GCC? I have had no luck in my attempts and I haven't seen many good examples for how to set it up. I've tried on cygwin gcc 3.4.4 and using 4.0 on Ubuntu.

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  • C++ - gcc-specific warnings

    - by HardCoder1986
    Hi! Got the following warning output when using GCC 4.5.0 & MinGW. Warning: .drectve `-aligncomm:___CTOR_LIST__,2 ' unrecognized Warning: .drectve `-aligncomm:___DTOR_LIST__,2' unrecognized What does it mean? I guess it's version-specific, because GCC 4.3.4 under cygwin didn't give that warning on the same project. If anyone had the following output (just curious that's that about), please advise me what to do.

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  • gcc check if file is main (#if __BASE_FILE__ == __FILE__)

    - by Marcin Raczkowski
    Hello. In ruby there's very common idiom to check if current file is "main" file: if __FILE__ == $0 # do something here (usually run unit tests) end I'd like to do something similar in C after reading gcc documentation I've figured that it should work like this: #if __FILE__ == __BASE_FILE__ // Do stuff #endif the only problem is after I try this: $ gcc src/bitmap_index.c -std=c99 -lm && ./a.out src/bitmap_index.c:173:1: error: token ""src/bitmap_index.c"" is not valid in preprocessor expressions Am I using #if wrong?

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  • GCC doesn't like C++ style casts with spaces

    - by uj2
    I am porting some C++ code to GCC, and apperantly it isn't happy with C++ style casting when sapces are involved, as in unsigned int(-1), long long(ShortVar) etc... It gives an error: expected primary-expression before 'long'. Is there any way to make peace with GCC without going over each one of those and rewrite in c-style?

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  • No warning from gcc when function definition in linked source different from function prototype in h

    - by c_c
    Hi, I had a problem with a part of my code, which after some iterations seemed to read NaN as value of a int of a struct. I think I found the error, but am still wondering why gcc (version 3.2.3 on a embedded Linux with busybox) did not warn me. Here are the important parts of the code: A c file and its header for functions to acquire data over USB: // usb_control.h typedef struct{ double mean; short *values; } DATA_POINTS; typedef struct{ int size; DATA_POINTS *channel1; //....7 more channels } DATA_STRUCT; DATA_STRUCT *create_data_struct(int N); // N values per channel int free_data_struct(DATA_STRUCT *data); int aqcu_data(DATA_STRUCT *data, int N); A c and header file with helper function (math, bitshift,etc...): // helper.h int mean(DATA_STRUCT *data); // helper.c (this is where the error is obviously) double mean(DATA_STRUCT *data) { // sum in for loop data->channel1->mean = sum/data->N; // ...7 more channels // a printf here displayed the mean values corretly } The main file // main.c #include "helper.h" #include "usb_control.h" // Allocate space for data struct DATA_STRUCT *data = create_data_struct(N); // get data for different delays for (delay = 0; delay < 500; delay += pw){ acqu_data(data, N); mean(data); // printf of the mean values first is correct. Than after 5 iterations // it is always NaN for channel1. The other channels are displayed correctly; } There were no segfaults nor any other missbehavior, just the NaN for channel1 in the main file. After finding the error, which was not easy, it was of course east to fix. The return type of mean(){} was wrong in the definition. Instead of double mean() it has to be int mean() as the prototype defines. When all the functions are put into one file, gcc warns me that there is a redefinition of the function mean(). But as I compile each c file seperately and link them afterwards gcc seems to miss that. So my questions would be. Why didn't I get any warnings, even non with gcc -Wall? Or is there still another error hidden which is just not causing problems now? Regards, christian

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  • How to specify which GCC for MacPorts to use?

    - by penyuan
    I compiled GCC 4.4.3 and installed it in /usr/local/bin, but whenever I install a port via MacPorts 1.8.2 the verbose output says MacPorts is using /usr/bin/gcc-4.2: checking for gcc... /usr/bin/gcc-4.2 How do I make MacPorts find my own GCC 4.4.3? Here is my existing path: /opt/local/bin:/opt/local/sbin:/usr/local/bin:/usr/local/lib:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin Thank you! P.S. I am running Mac OS X 10.6.2 Snow Leopard.

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  • Lightweight spinlocks built from GCC atomic operations?

    - by Thomas
    I'd like to minimize synchronization and write lock-free code when possible in a project of mine. When absolutely necessary I'd love to substitute light-weight spinlocks built from atomic operations for pthread and win32 mutex locks. My understanding is that these are system calls underneath and could cause a context switch (which may be unnecessary for very quick critical sections where simply spinning a few times would be preferable). The atomic operations I'm referring to are well documented here: http://gcc.gnu.org/onlinedocs/gcc-4.4.1/gcc/Atomic-Builtins.html Here is an example to illustrate what I'm talking about. Imagine a RB-tree with multiple readers and writers possible. RBTree::exists() is read-only and thread safe, RBTree::insert() would require exclusive access by a single writer (and no readers) to be safe. Some code: class IntSetTest { private: unsigned short lock; RBTree<int>* myset; public: // ... void add_number(int n) { // Aquire once locked==false (atomic) while (__sync_bool_compare_and_swap(&lock, 0, 0xffff) == false); // Perform a thread-unsafe operation on the set myset->insert(n); // Unlock (atomic) __sync_bool_compare_and_swap(&lock, 0xffff, 0); } bool check_number(int n) { // Increment once the lock is below 0xffff u16 savedlock = lock; while (savedlock == 0xffff || __sync_bool_compare_and_swap(&lock, savedlock, savedlock+1) == false) savedlock = lock; // Perform read-only operation bool exists = tree->exists(n); // Decrement savedlock = lock; while (__sync_bool_compare_and_swap(&lock, savedlock, savedlock-1) == false) savedlock = lock; return exists; } }; (lets assume it need not be exception-safe) Is this code indeed thread-safe? Are there any pros/cons to this idea? Any advice? Is the use of spinlocks like this a bad idea if the threads are not truly concurrent? Thanks in advance. ;)

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  • Why does gcc generate verbose assembly code?

    - by Jared Nash
    I have a question about assembly code generated by GCC (-S option). Since, I am new to assembly language and know very little about it, the question will be very primitive. Still, I hope somebody will answer: Suppose, I have this C code: main(){ int x = 15; int y = 6; int z = x - y; return 0; } If we look at the assembly code (especially the part corresponding to int z = x - y ), we see: main: ... subl $16, %esp movl $15, -4(%ebp) movl $6, -8(%ebp) movl -8(%ebp), %eax movl -4(%ebp), %edx movl %edx, %ecx subl %eax, %ecx movl %ecx, %eax movl %eax, -12(%ebp) ... Why doesn't GCC generate something like this, which is less copying things around. main: ... movl $15, -4(%ebp) movl $6, -8(%ebp) movl -8(%ebp), %edx movl -4(%ebp), %eax subl %edx, %eax movl %eax, -12(%ebp) ... P.S. Linux zion-5 2.6.32-21-generic #32-Ubuntu SMP Fri Apr 16 08:10:02 UTC 2010 i686 GNU/Linux gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5)

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  • Using GCC (MinGW) to compile OpenGL on Windows

    - by Casey
    I've searched on google and haven't been able to come up with a solution. I would like to compile some OpenGL programming using GCC. In the GL folder in GCC I have the following headers: gl.h glext.h glu.h Then in my system32 file I have the following .dll opengl32.dll glu32.dll glut32.dll If I wanted to write a simple OpenGL "Hello World" and link and compile with GCC, what is the correct process? I'm attempting to use this code: #include <GL/gl.h> #include <GL/glut.h> void display() { glClear(GL_COLOR_BUFFER_BIT); glFlush(); } int main(int argc, char **argv) { glutInit(&argc, argv); glutInitWindowSize(512,512); glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); glutCreateWindow("The glut hello world program"); glutDisplayFunc(display); glClearColor(0.0, 0.0, 0.0, 1.0); glutMainLoop(); // Infinite event loop return 0; } Thank you in advance for the help.

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  • Problem with linking in gcc

    - by chitra
    I am compiling a program in which a header file is defined in multiple places. Contents of each of the header file is different, though the variable names are the same internal members within the structures are different . Now at the linking time it is picking up from a library file which belongs to a different header not the one which is used during compilation. Due to this I get an error at link time. Since there are so many libraries with the same name I don't know which library is being picked up. I have lot of oems and other customized libraries which are part of this build. I checked out the options in gcc which talks about selecting different library files to be included. But no where I am able to see an option which talks about which libraries are being picked up the linker. If the linker is able to find more than one library file name, then which does the linker pick up is something which I am not able to understand. I don't want to specify any path, rather I want to understand how the linker is resolving the multiple libraries that it is able to locate. I tried putting -v option, but that doesn't list out the path from which the gcc picks up the library. I am using gcc on linux. Any help in this regard is highly appreciated. Regards, Chitra

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  • gcc does not resolve extern global variables, with or without -c option

    - by Moons
    Hello everyone! So i have this issue : i am declaring some extern global variables in my C program. If I don't use the -c option for gcc, i get undefined references errors. But with that -c option, the linking is not done, which means that i don't have an executable generated. So how do I solve this? Here is my makefile. As I am not good with writing makefiles, I took one from another project then I changed a few things. So maybe I'm missing something here. # Makefile calculPi INCL = -I$(INCL_DIR) DEFS = -D_DEBUG_ CXX_FLAGS =-g -c -lpthread -lm CXX = gcc $(CXX_FLAGS) $(INCL) $(DEFS) LINK_CXX = gcc OBJ = approx.o producteur.o sequentialApproximation.o main.o LINKOBJ = approx.o producteur.o sequentialApproximation.o main.o BIN = calculPi.exe RM = rm -fv all: calculPi.exe clean: ${RM} *\~ \#*\# $(OBJ) clean_all: clean ${RM} $(BIN) cleanall: clean ${RM} $(BIN) $(BIN): $(OBJ) $(CXX) $(LINKOBJ) -o "calculPi.exe" main.o: main.c $(CXX) main.c -o main.o $(CXX_FLAGS) approx.o: approx.c approx.h $(CXX) -c approx.c -o approx.o $(CXX_FLAGS); producteur.o: producteur.c producteur.h $(CXX) -c producteur.c -o producteur.o $(CXX_FLAGS); sequentialApproximation.o : sequentialApproximation.c sequentialApproximation.h $(CXX) -c sequentialApproximation.c -o sequentialApproximation.o $(CXX_FLAGS);

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  • The linking is not done (gcc compilation)

    - by Moons
    Hello everyone! So i have this issue : i am declaring some extern global variables in my C program. If I don't use the -c option for gcc, i get undefined references errors. But with that -c option, the linking is not done, which means that i don't have an executable generated. So how do I solve this? Here is my makefile. As I am not good with writing makefiles, I took one from another project then I changed a few things. So maybe I'm missing something here. # Makefile calculPi INCL = -I$(INCL_DIR) DEFS = -D_DEBUG_ CXX_FLAGS =-g -c -lpthread -lm CXX = gcc $(CXX_FLAGS) $(INCL) $(DEFS) LINK_CXX = gcc OBJ = approx.o producteur.o sequentialApproximation.o main.o LINKOBJ = approx.o producteur.o sequentialApproximation.o main.o BIN = calculPi.exe RM = rm -fv all: calculPi.exe clean: ${RM} *\~ \#*\# $(OBJ) clean_all: clean ${RM} $(BIN) cleanall: clean ${RM} $(BIN) $(BIN): $(OBJ) $(CXX) $(LINKOBJ) -o "calculPi.exe" main.o: main.c $(CXX) main.c -o main.o $(CXX_FLAGS) approx.o: approx.c approx.h $(CXX) -c approx.c -o approx.o $(CXX_FLAGS); producteur.o: producteur.c producteur.h $(CXX) -c producteur.c -o producteur.o $(CXX_FLAGS); sequentialApproximation.o : sequentialApproximation.c sequentialApproximation.h $(CXX) -c sequentialApproximation.c -o sequentialApproximation.o $(CXX_FLAGS);

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  • Small openmp programm freezes sometimes (gcc, c, linux)

    - by osgx
    Hello Just write a small omp test, and it does not work correctly all the times: #include <omp.h> int main() { int i,j=0; #pragma omp parallel for(i=0;i<1000;i++) { #pragma omp barrier j+= j^i; } return j; } The usage of j for writing from all threads is incorrect in this example, BUT there must be only nondeterministic value of j I have a freeze. Compiled with gcc-4.3.1 -fopenmp a.c -o gcc -static Run on 4-core x86_Core2 Linux server: $ ./gcc and got freeze (sometimes; like 1 freeze for 4-5 fast runs). Strace: [pid 13118] <... futex resumed> ) = 0 [pid 13118] futex(0x80d3014, FUTEX_WAIT, 2, NULL <unfinished ...> [pid 13120] <... futex resumed> ) = 0 [pid 13119] futex(0x80d3014, FUTEX_WAIT, 2, NULL <unfinished ...> [pid 13120] futex(0x80d3014, FUTEX_WAKE, 1) = 1 [pid 13120] futex(0x80cd798, FUTEX_WAIT, 1, NULL <unfinished ...> [pid 13109] <... futex resumed> ) = 0 [pid 13109] futex(0x80d3014, FUTEX_WAKE, 1) = 1 [pid 13109] futex(0x80d3020, FUTEX_WAIT, 251, NULL <unfinished ...> [pid 13118] <... futex resumed> ) = 0 [pid 13118] futex(0x80d3014, FUTEX_WAKE, 1) = 1 [pid 13119] <... futex resumed> ) = 0 [pid 13118] futex(0x80d3020, FUTEX_WAIT, 251, NULL <unfinished ...> [pid 13119] futex(0x80d3014, FUTEX_WAKE, 1) = 0 [pid 13119] futex(0x80d3020, FUTEX_WAIT, 251, NULL <freeze> Why do I have a freeze (deadlock)?

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  • Compiling a program with a legacy version of gcc

    - by wyatt
    This is probably a very difficult problem to troubleshoot with the information I can practically provide, but I'm hoping someone might be able to at least point me in a possible direction. I'm trying to install HTK (http://htk.eng.cam.ac.uk/), which, according to this page needs to be installed using gcc 3.4. Their method of implementing backwards compatibility: #yum install compat-gcc-34-c++ compat-gcc-34 won't work for me as I'm running Ubuntu (On that note, I take it I can't simply install YUM and the subsequent package, since it's an entirely different distro, but if I'm wrong I'd love to hear it). I instead installed two versions of gcc 3.4 - 3.4.0 and 3.4.6 using instructions from this site. I then added the lines suggested by that page to the top of the makefile (on this note, what's the difference between makefile and makefile.in? I tried adding the lines to the top of both files regardless), both for version 3.4.0 and 3.4.6, but both failed. I also tried, on the off-chance, compiling it with my current version (4.4.1), but that also failed. I got the errors: (cd HTKLib && make HTKLib.a) \ || case "" in k) fail=yes;; ) exit 1;; esac; make1: Entering directory /home/charles/bin/htk-3.4/HTKLib' gcc -ansi -D_SVID_SOURCE -DOSS_AUDIO -D'ARCH="i686"' -Wall -Wno-switch -g -O2 -I. -c -o HGraf.o HGraf.c HGraf.c:73:77: error: X11/Xlib.h: No such file or directory HGraf.c:74:23: error: X11/Xutil.h: No such file or directory HGraf.c:75:21: error: X11/Xos.h: No such file or directory HGraf.c:77:27: error: X11/keysymdef.h: No such file or directory HGraf.c:87: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token HGraf.c:88: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘rootW’ HGraf.c:91: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘theCmap’ HGraf.c:92: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘theGC’ HGraf.c:93: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘gcs’ HGraf.c:95: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token HGraf.c:96: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘report’ HGraf.c:97: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘hints’ HGraf.c:111: error: ‘GXcopy’ undeclared here (not in a function) HGraf.c:111: error: ‘GXor’ undeclared here (not in a function) HGraf.c:111: error: ‘GXxor’ undeclared here (not in a function) HGraf.c:111: error: ‘GXinvert’ undeclared here (not in a function) HGraf.c:151: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token HGraf.c: In function ‘InstallFonts’: HGraf.c:164: error: ‘FontInfo’ undeclared (first use in this function) HGraf.c:164: error: (Each undeclared identifier is reported only once HGraf.c:164: error: for each function it appears in.) HGraf.c:164: warning: implicit declaration of function ‘XLoadQueryFont’ HGraf.c:164: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:167: error: ‘DefaultFont’ undeclared (first use in this function) HGraf.c: At top level: HGraf.c:176: error: expected ‘)’ before ‘*’ token HGraf.c: In function ‘HGetEvent’: HGraf.c:219: error: ‘XEvent’ undeclared (first use in this function) HGraf.c:219: error: expected ‘;’ before ‘xev’ HGraf.c:223: warning: implicit declaration of function ‘XFlush’ HGraf.c:223: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:225: warning: implicit declaration of function ‘XEventsQueued’ HGraf.c:225: error: ‘QueuedAfterFlush’ undeclared (first use in this function) HGraf.c:226: warning: implicit declaration of function ‘XNextEvent’ HGraf.c:226: error: ‘xev’ undeclared (first use in this function) HGraf.c:228: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:230: error: ‘ButtonPress’ undeclared (first use in this function) HGraf.c:235: error: ‘ButtonRelease’ undeclared (first use in this function) HGraf.c:240: error: ‘MotionNotify’ undeclared (first use in this function) HGraf.c:245: error: ‘KeyPress’ undeclared (first use in this function) HGraf.c:249: warning: implicit declaration of function ‘DecodeKeyPress’ HGraf.c:251: error: ‘KeyRelease’ undeclared (first use in this function) HGraf.c:257: error: ‘Expose’ undeclared (first use in this function) HGraf.c: In function ‘HEventsPending’: HGraf.c:281: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:281: error: ‘QueuedAfterFlush’ undeclared (first use in this function) HGraf.c: In function ‘HMousePos’: HGraf.c:288: error: ‘Window’ undeclared (first use in this function) HGraf.c:288: error: expected ‘;’ before ‘root’ HGraf.c:293: warning: implicit declaration of function ‘XQueryPointer’ HGraf.c:293: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:293: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:293: error: ‘root’ undeclared (first use in this function) HGraf.c:293: error: ‘child’ undeclared (first use in this function) HGraf.c: In function ‘InstallColours’: HGraf.c:311: error: ‘XColor’ undeclared (first use in this function) HGraf.c:311: error: expected ‘;’ before ‘greyDef’ HGraf.c:317: warning: implicit declaration of function ‘XParseColor’ HGraf.c:317: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:317: error: ‘theCmap’ undeclared (first use in this function) HGraf.c:317: error: ‘colourDef’ undeclared (first use in this function) HGraf.c:320: warning: implicit declaration of function ‘XAllocColor’ HGraf.c:334: error: ‘whiteDef’ undeclared (first use in this function) HGraf.c:334: warning: implicit declaration of function ‘XQueryColor’ HGraf.c:335: error: ‘blackDef’ undeclared (first use in this function) HGraf.c:341: error: ‘greyDef’ undeclared (first use in this function) HGraf.c: In function ‘HSetColour’: HGraf.c:361: warning: implicit declaration of function ‘XSetForeground’ HGraf.c:361: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:361: error: ‘gcs’ undeclared (first use in this function) HGraf.c: In function ‘HSetGrey’: HGraf.c:370: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:370: error: ‘gcs’ undeclared (first use in this function) HGraf.c: In function ‘HDrawLines’: HGraf.c:388: warning: implicit declaration of function ‘XDrawLines’ HGraf.c:388: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:388: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:388: error: ‘theGC’ undeclared (first use in this function) HGraf.c:388: error: ‘XPoint’ undeclared (first use in this function) HGraf.c:388: error: expected expression before ‘)’ token HGraf.c: In function ‘HDrawRectangle’: HGraf.c:395: warning: implicit declaration of function ‘XDrawRectangle’ HGraf.c:395: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:395: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:395: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HFillRectangle’: HGraf.c:402: warning: implicit declaration of function ‘XFillRectangle’ HGraf.c:402: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:402: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:402: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HDrawLine’: HGraf.c:408: warning: implicit declaration of function ‘XDrawLine’ HGraf.c:408: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:408: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:408: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HFillPolygon’: HGraf.c:414: warning: implicit declaration of function ‘XFillPolygon’ HGraf.c:414: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:414: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:414: error: ‘theGC’ undeclared (first use in this function) HGraf.c:414: error: ‘XPoint’ undeclared (first use in this function) HGraf.c:414: error: expected expression before ‘)’ token HGraf.c: In function ‘HDrawArc’: HGraf.c:427: warning: implicit declaration of function ‘XDrawArc’ HGraf.c:427: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:427: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:427: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HFillArc’: HGraf.c:440: warning: implicit declaration of function ‘XFillArc’ HGraf.c:440: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:440: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:440: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HPrintf’: HGraf.c:451: warning: implicit declaration of function ‘XDrawString’ HGraf.c:451: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:451: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:451: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HCopyArea’: HGraf.c:457: warning: implicit declaration of function ‘XCopyArea’ HGraf.c:457: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:457: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:457: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HPlotVector’: HGraf.c:476: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:476: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:476: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HSetFontSize’: HGraf.c:490: error: ‘CurrentFont’ undeclared (first use in this function) HGraf.c:490: error: ‘DefaultFont’ undeclared (first use in this function) HGraf.c:499: error: ‘FontInfo’ undeclared (first use in this function) HGraf.c:502: warning: implicit declaration of function ‘XSetFont’ HGraf.c:502: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:502: error: ‘gcs’ undeclared (first use in this function) HGraf.c: In function ‘HSetLineWidth’: HGraf.c:511: warning: implicit declaration of function ‘XSetLineAttributes’ HGraf.c:511: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:511: error: ‘gcs’ undeclared (first use in this function) HGraf.c:511: error: ‘LineSolid’ undeclared (first use in this function) HGraf.c:511: error: ‘JoinRound’ undeclared (first use in this function) HGraf.c:511: error: ‘FillSolid’ undeclared (first use in this function) HGraf.c: In function ‘HSetXMode’: HGraf.c:517: error: ‘theGC’ undeclared (first use in this function) HGraf.c:517: error: ‘gcs’ undeclared (first use in this function) HGraf.c: In function ‘CentreX’: HGraf.c:523: warning: implicit declaration of function ‘XTextWidth’ HGraf.c:523: error: ‘CurrentFont’ undeclared (first use in this function) HGraf.c: In function ‘CentreY’: HGraf.c:529: error: ‘CurrentFont’ undeclared (first use in this function) HGraf.c: In function ‘HTextWidth’: HGraf.c:535: error: ‘CurrentFont’ undeclared (first use in this function) HGraf.c: In function ‘HTextHeight’: HGraf.c:541: error: ‘CurrentFont’ undeclared (first use in this function) HGraf.c: In function ‘HDrawImage’: HGraf.c:550: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token HGraf.c:550: error: ‘xi’ undeclared (first use in this function) HGraf.c:557: warning: implicit declaration of function ‘XDestroyImage’ HGraf.c:558: warning: implicit declaration of function ‘XGetImage’ HGraf.c:558: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:558: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:558: error: ‘AllPlanes’ undeclared (first use in this function) HGraf.c:558: error: ‘XYPixmap’ undeclared (first use in this function) HGraf.c:562: warning: implicit declaration of function ‘XPutPixel’ HGraf.c:564: warning: implicit declaration of function ‘XPutImage’ HGraf.c:564: error: ‘theGC’ undeclared (first use in this function) HGraf.c: In function ‘HFlush’: HGraf.c:570: error: ‘theDisp’ undeclared (first use in this function) HGraf.c: In function ‘InitGCs’: HGraf.c:780: error: ‘XGCValues’ undeclared (first use in this function) HGraf.c:780: error: expected ‘;’ before ‘values’ HGraf.c:783: error: ‘GCLineWidth’ undeclared (first use in this function) HGraf.c:783: error: ‘GCFunction’ undeclared (first use in this function) HGraf.c:783: error: ‘GCForeground’ undeclared (first use in this function) HGraf.c:785: error: ‘values’ undeclared (first use in this function) HGraf.c:788: error: ‘gcs’ undeclared (first use in this function) HGraf.c:788: warning: implicit declaration of function ‘XCreateGC’ HGraf.c:788: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:788: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:790: error: ‘GCPlaneMask’ undeclared (first use in this function) HGraf.c: In function ‘InitGlobals’: HGraf.c:800: warning: implicit declaration of function ‘DefaultScreen’ HGraf.c:800: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:801: error: ‘theCmap’ undeclared (first use in this function) HGraf.c:801: warning: implicit declaration of function ‘DefaultColormap’ HGraf.c:802: error: ‘rootW’ undeclared (first use in this function) HGraf.c:802: warning: implicit declaration of function ‘RootWindow’ HGraf.c:803: error: ‘theGC’ undeclared (first use in this function) HGraf.c:803: warning: implicit declaration of function ‘DefaultGC’ HGraf.c:804: error: ‘theVisual’ undeclared (first use in this function) HGraf.c:804: warning: implicit declaration of function ‘DefaultVisual’ HGraf.c:805: warning: implicit declaration of function ‘DisplayCells’ HGraf.c:806: warning: implicit declaration of function ‘DisplayWidth’ HGraf.c:807: warning: implicit declaration of function ‘DisplayHeight’ HGraf.c:808: warning: implicit declaration of function ‘DisplayPlanes’ HGraf.c:809: warning: implicit declaration of function ‘WhitePixel’ HGraf.c:810: warning: implicit declaration of function ‘BlackPixel’ HGraf.c: In function ‘MakeXGraf’: HGraf.c:817: error: ‘Window’ undeclared (first use in this function) HGraf.c:817: error: expected ‘;’ before ‘window’ HGraf.c:818: error: ‘XSetWindowAttributes’ undeclared (first use in this function) HGraf.c:818: error: expected ‘;’ before ‘setwinattr’ HGraf.c:823: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:823: warning: implicit declaration of function ‘XOpenDisplay’ HGraf.c:824: warning: implicit declaration of function ‘XDisplayName’ HGraf.c:828: error: ‘parent’ undeclared (first use in this function) HGraf.c:829: error: ‘window’ undeclared (first use in this function) HGraf.c:829: warning: implicit declaration of function ‘XCreateSimpleWindow’ HGraf.c:831: error: ‘CWBackingStore’ undeclared (first use in this function) HGraf.c:831: error: ‘setwinattr’ undeclared (first use in this function) HGraf.c:831: error: ‘WhenMapped’ undeclared (first use in this function) HGraf.c:832: warning: implicit declaration of function ‘XChangeWindowAttributes’ HGraf.c:834: error: ‘hints’ undeclared (first use in this function) HGraf.c:834: error: ‘PPosition’ undeclared (first use in this function) HGraf.c:834: error: ‘PSize’ undeclared (first use in this function) HGraf.c:834: error: ‘PMaxSize’ undeclared (first use in this function) HGraf.c:834: error: ‘PMinSize’ undeclared (first use in this function) HGraf.c:841: warning: implicit declaration of function ‘XSetStandardProperties’ HGraf.c:841: error: ‘None’ undeclared (first use in this function) HGraf.c:843: warning: implicit declaration of function ‘XSelectInput’ HGraf.c:843: error: ‘ExposureMask’ undeclared (first use in this function) HGraf.c:843: error: ‘KeyPressMask’ undeclared (first use in this function) HGraf.c:843: error: ‘ButtonPressMask’ undeclared (first use in this function) HGraf.c:844: error: ‘ButtonReleaseMask’ undeclared (first use in this function) HGraf.c:844: error: ‘PointerMotionHintMask’ undeclared (first use in this function) HGraf.c:844: error: ‘PointerMotionMask’ undeclared (first use in this function) HGraf.c:845: warning: implicit declaration of function ‘XMapWindow’ HGraf.c:845: error: ‘theWindow’ undeclared (first use in this function) HGraf.c:850: error: ‘report’ undeclared (first use in this function) HGraf.c:851: error: ‘Expose’ undeclared (first use in this function) HGraf.c:852: warning: implicit declaration of function ‘XSendEvent’ HGraf.c:852: error: ‘False’ undeclared (first use in this function) HGraf.c: In function ‘TermHGraf’: HGraf.c:861: error: ‘theDisp’ undeclared (first use in this function) HGraf.c:862: warning: implicit declaration of function ‘XCloseDisplay’ make[1]: *** [HGraf.o] Error 1 make[1]: Leaving directory/home/charles/bin/htk-3.4/HTKLib' make: ** [HTKLib/HTKLib.a] Error 1 Thank you for any help you can provide.

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  • How does GCC compile applications that reference a static library

    - by technobrat
    I've read that the gcc compiler can perform certain optimization when compiling an application that references a static library, for instance - it will "pull" in only that code from the static library that the application depends upon. This helps keep the size of the application's executable to a minimum if portions of the static library are not being used by the app. 1) Is this true? 2) How does GCC know what code from the static library the application is actually using? Does it only look t the header files that are included (directly and indirectly) in the application and then pull code accordingly? Or does it actually look at what methods from the static library are being called?

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  • How to overcome vc++ warning C4003 while writing common code for both gcc and vc++

    - by compbugs
    I have a code that is compiled in both gcc and vc++. The code has a common macro which is called in two scenarios. When we pass some parameters to it. When we don't want to pass any parameters to it. An example of such a code is: #define B(X) A1##X int main() { int B(123), B(); return 0; } The expect output from the pre-processing step of compilation is: int main() { int A1123, A1; return 0; } The output for both gcc and vc++ is as expected, but vc++ gives a warning: warning C4003: not enough actual parameters for macro 'B' How can I remove this warning and yet get the expected output? Thanks.

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  • LLVM: bitcode with llvm-gcc (mingw) for windows

    - by TheShow
    Hi, i'm currently building a small JIT compiler. For the language I need a runtime library for some special math functions. I think the best would be to compile the lib to bitcode and link it. The compiler should be integrated in a product and as of this, it must work under windows (VC10, 64bit). So is it possible to build the math lib with the mingw llvm-gcc build an link it later with the JITed Code? Or are there any problems regarding the portability of the bitcode build with llvm-gcc under mingw? If there are problems, what solution would you suggest?

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  • gcc does not generate debugger info when using -g, -ggdb, -g3, or -ggdb3

    - by CJJ
    I'm using GCC 4.4.1 and GDB 7.0-ubuntu on Ubuntu 9.10. However, GCC won't generate debugger info when using any of the following switches: -g, -g3, -ggdb, or -ggdb3. So when I run the program with GDB, its as if there was no debugger information generated. I have created very simple test source files in a new, empty folder. Here is one example: #include <stdlib.h> #include <stdio.h> int main (int argc, char **argv) { char msg[4]; // allocate 4 bytes on the stack strcpy (msg, "hello world"); // overflow printf ("%s\n", msg); return 0; }

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  • Demystifying gcc under lpthreads

    - by Berkay
    in these i'm playing with thread library and trying to implement some functions. One of the tutorial says that to run the program use : gcc -lpthread -lrt -lc -lm project1.c scheduler.c -o out first of all i need deep understanding of what is gcc doing in each line, lpthread is used for what? what are the contributions of lrt -lc -lm ? project1.c and scheduler.c is compiled together so what should i understand? i checked the code and any of them not included in project1.c or scheduler.c. as an output clearly it gives "out". secondly the author states that to run the program you have to use ./out number filename (For example, ./out 2 sample.txt) To make these clear as far as i understand the main function gets number and sample.txt as an input.(?) thanks for your answers and making me clear.

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  • strod() and sprintf() inconsistency under GCC and MSVC

    - by Dmitry Sapelnikov
    I'm working on a cross-platform app for Windows and Mac OS X, and I have a problem with two standard C library functions: strtod() (string-to-double conversion) ? sprintf (when used for outputting double-precision floating point numbers) -- their GCC and MSVC versions return different results. I'm looking for a well-tested cross-platform open-source implementation of those functions, or just for a pair of functions that would correctly and consistently convert double to string and back. I've already tried the clib GCC implementation, but the code is too long and too dependent on other source files, so I expect the adaptation to be difficult. What implementations of string-to-double and double-to-string functions would you recommend?

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  • C++0x regex in GCC

    - by rwallace
    The following code: #include <regex> using namespace std; (snippage) regex_search(s, m, re); works in Microsoft C++, but GCC 4.4.3 gives the following error message: /usr/include/c++/4.4/tr1_impl/regex:2255: warning: inline function ‘bool std::regex_search(_Bi_iter, _Bi_iter, std::match_results<_Bi_iter, _Allocator&, const std::basic_regex<_Ch_type, _Rx_traits&, std::regex_constants::match_flag_type) [with _Bi_iter = __gnu_cxx::__normal_iterator, std::allocator , _Allocator = std::allocator, std::allocator , _Ch_type = char, _Rx_traits = std::regex_traits]’ used but never defined Of course it wouldn't surprise me if regex were simply one of the C++0x features still on the to-do list for GCC, but what I'm scratching my head over is, in that case, why does it happily take the include directive, variable declarations etc. and only trip over the function call (which it even seems to understand). Is there something I'm missing?

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  • Returning structs in registers - ARM ABI in GCC

    - by jbcreix
    Hi, In the ARM ABI documentation I come across functions defined like: __value_in_regs struct bar foo(int a, int b) { ... } but GCC(4.3.3) doesn't allow it and all I could find are references to some RealView compiler. Is there any way of doing this from GCC? I have tried -freg-struct-return but it doesn't make a difference. As it is an ABI I can't change the original programs, and returning a regular struct mangles the stack. I would rather not using assembly for this if avoidable as it isn't otherwise necessary. Thanks!

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