On Thu, Mar 31, 2005 at 10:19:21AM +0200, Tim Blechmann wrote:
> AC_CHECK_LIB(m,sin)
Use AC_SEARCH_LIBS for `sin' and for any other function found in libc on some
systems and in an auxiliary library like libm elsewhere.
The last paragraph of the AC_CHECK_LIB documentation in CVS Autoconf makes a
comment to this effect.
> the specific part in the config.log says:
> configure:4961: checking for sin in -lm
> configure:4991: gcc -o conftest -g -O2 -L/usr/X11R6/lib conftest.c -lm
> -Wl,-s hared -Wl,-export-dynamic -lXxf86vm -lXext -lX11 >&5
-Wl,-shared causes
> /usr/lib/libc_nonshared.a(elf-init.oS)(.text+0x1c): In function
> `__libc_csu_init ':
all these errors. As such, the test result is in fact correct: linking in -lm
(with your link line bearing -Wl,-shared) for `sin' will fail.
Of course, if you somehow link your application without -Wl,-shared, you just
need to change the flags configuration commands see. In that case, consider
adding that flag later in `configure' or in your Makefile.