freeglut / Bugs / #158 A couple of compiler warnings

Diederick C. Niehorster - 2011-11-01

Dear Paletta,

Thanks for letting us know. However, it seems we can't reproduce the issue: https://sourceforge.net/mailarchive/forum.php?thread_name=20111025201755.GA14138%40mutantstargoat.com&forum_name=freeglut-developer. Could you continue discussing the issue on the mailing list if you're still experiencing it?

Thanks!
Dee

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Nigel Stewart - 2011-12-09

I see something similar for reeglut_gamemode.c

gcc4 -fPIC -Wall -Wno-switch -Wno-missing-braces -fvisibility=hidden -nostdinc ... -m32 -I. -Iinclude -g -DDEBUG -D_DEBUG -fno-exceptions -DHAVE_CONFIG_H=1 -o../../../../tools/cg/Common/freeglut-2.6.0/built/freeglutlib_Linux_gcc4_debug/freeglut_gamemode.o -c src/freeglut_gamemode.c
src/freeglut_gamemode.c: In function ‘fghRememberState’:
src/freeglut_gamemode.c:168: warning: unused variable ‘error_base’
src/freeglut_gamemode.c:168: warning: unused variable ‘event_base’
src/freeglut_gamemode.c: At top level:
src/freeglut_gamemode.c:45: warning: ‘xrandr_resize’ defined but not used
src/freeglut_geometry.c

Note that this build has HAVE_X11_EXTENSIONS_XF86VMODE_H undefined.

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John Tsiombikas - 2011-12-10

Sorry I still can't reproduce it.
I disabled XF86VidMode by changing the define lines in config.h to:
#undef HAVE_LIBXXF86VM
#undef HAVE_X11_EXTENSIONS_XF86VMODE_H
and recompiled. The Xrandr code gets compiled as should be and gamemode works.

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fabio - 2011-12-22

I am still experiencing the two warnings compiling r964 on Ubuntu 11.04 on my test PPA:
https://launchpad.net/~oibaf/+archive/test/+packages

Full log is here:
https://launchpadlibrarian.net/88133195/buildlog_ubuntu-natty-i386.freeglut_2.6.0-1ubuntu2%2Br964~gd~n_BUILDING.txt.gz

Let me know if you need other informations.

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Diederick C. Niehorster - 2012-11-20

Hi Paletta,

Do you still observe this issue in current trunk?

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fabio - 2012-12-08

On 2.8.0 I still get these warnings:

freeglut_gamemode.c:44:12: warning: 'xrandr_resize' defined but not used [-Wunused-function]
freeglut_input_devices.c:204:16: warning: variable 'dials' set but not used [-Wunused-but-set-variable]
freeglut_state.c:55:7: warning: variable 'result' set but not used [-Wunused-but-set-variable]
freeglut_state.c:844:15: warning: variable 'result' set but not used [-Wunused-but-set-variable]
freeglut_window.c:306:17: warning: variable 'result' set but not used [-Wunused-but-set-variable]
CallbackMaker.c:435:7: warning: variable 'menuID' set but not used [-Wunused-but-set-variable]
CallbackMaker.c:529:9: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result]
fractals.c:306:7: warning: variable 'fractal_window' set but not used [-Wunused-but-set-variable]
fractals_random.c:350:7: warning: variable 'fractal_window' set but not used [-Wunused-but-set-variable]
lorenz.c:223:12: warning: variable 'dist' set but not used [-Wunused-but-set-variable]
one.c:253:9: warning: variable 'menuID' set but not used [-Wunused-but-set-variable]

Then it fails to build with:
In file included from /usr/include/GL/gl.h:2085:0,
from ../../../include/GL/freeglut_std.h:122,
from ../../../include/GL/freeglut.h:17,
from smooth_opengl3.c:45:
/usr/include/GL/glext.h:6699:25: note: previous declaration of 'PFNGLSHADERSOURCEPROC' was here

Full log here:
https://launchpadlibrarian.net/123516257/buildlog_ubuntu-quantal-amd64.freeglut_2.8.0-1%7Eexp1%7Equantal1%7Egd_FAILEDTOBUILD.txt.gz

I also tried on r1488 but I don't know how to build, there is no Makefile/autogen.sh/configure.

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Diederick C. Niehorster - 2012-12-18

Hi Paletta,

Thanks for trying things out! We have moved on quite a bit since 2.8.0. In fact, 2.8.1 is around the corner, grab a copy from:
svn co https://freeglut.svn.sourceforge.net/svnroot/freeglut/tags/FG_2_8_1_RC1/freeglut
This should build using a similar route as 2.8.0.

For current trunk, we have switched to CMake as a buildsystem, hence the missing Makefile/autogen.sh/configure.

Best,
Dee

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fabio - 2012-12-18

OK, I tried the 2.8.1 branch. There are still these warnings:
freeglut_gamemode.c:44:12: warning: 'xrandr_resize' defined but not used [-Wunused-function]
freeglut_input_devices.c:204:16: warning: variable 'dials' set but not used [-Wunused-but-set-variable]
freeglut_state.c:55:7: warning: variable 'result' set but not used [-Wunused-but-set-variable]
freeglut_state.c:881:15: warning: variable 'result' set but not used [-Wunused-but-set-variable]
freeglut_window.c:299:17: warning: variable 'result' set but not used [-Wunused-but-set-variable]
freeglut_xinput.c:172:4: warning: implicit declaration of function 'fgPlatformGetModifiers' [-Wimplicit-function-declaration]
CallbackMaker.c: In function 'Warning':
CallbackMaker.c:139:5: warning: format '%d' expects a matching 'int' argument [-Wformat]
CallbackMaker.c: In function 'Error':
CallbackMaker.c:149:5: warning: format '%d' expects a matching 'int' argument [-Wformat]
CallbackMaker.c: In function 'main':
CallbackMaker.c:467:7: warning: variable 'menuID' set but not used [-Wunused-but-set-variable]
CallbackMaker.c:566:9: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result]
CallbackMaker.c: In function 'Error':
CallbackMaker.c:156:11: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result]

Then it still fails to build with:
/bin/bash ../../../libtool --tag=CC --mode=link i686-linux-gnu-gcc -I../../../include -g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -pedantic -export-dynamic -Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now -o CallbackMaker CallbackMaker-CallbackMaker.o ../../../src/libglut.la -lGL -lXext -lX11 -lXi -lXxf86vm
libtool: link: i686-linux-gnu-gcc -I../../../include -g -O2 -fPIE -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -pedantic -Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z -Wl,relro -Wl,-z -Wl,now -o .libs/CallbackMaker CallbackMaker-CallbackMaker.o -Wl,--export-dynamic ../../../src/.libs/libglut.so -lGL -lXext -lX11 -lXi -lXxf86vm
../../../src/.libs/libglut.so: undefined reference to `fgPlatformGetModifiers'
collect2: error: ld returned 1 exit status
make[5]: *** [CallbackMaker] Error 1

Full build log here:
https://launchpadlibrarian.net/126091350/buildlog_ubuntu-quantal-i386.freeglut_2.8.0-1~exp1%2Bsvn2_FAILEDTOBUILD.txt.gz

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