[GRASS-dev] configuration X fails with strict gcc flags

[Markus Neteler]

Glynn Clements wrote:
> 
> 
> Markus Neteler wrote:
> 
>> I have a new laptop with Mandriva 2007.1 (so x.org). X is not
>> recognised although all header files are apparently there.
>> I debugged a bit and found the following (conftest.c and confdefs.h
>> manually extracted from configure):
>> 
>> cat conftest.c
>> #line 4672 "configure"
>> #include "confdefs.h"
>> #include <X11/Intrinsic.h>
>> 
>> int main() {
>> XtMalloc()
>> ; return 0; }
> 
>> gcc -o conftest -g -Wall -Werror-implicit-function-declaration
>> -fno-common -mtune=nocona -m64 -minline-all-stringops   
>> -Wl,--export-dynamic  -L/usr/lib64 conftest.c -lXt
>> configure: In function 'main':
>> configure:4676: error: too few arguments to function 'XtMalloc'
> 
> Odd; my config.log has:
> 
> 	configure:4675: warning: implicit declaration of function `XtMalloc'
> 

Mine, too. Sorry, had added a ine of debug output and forgot to mention.

configure:4510: checking for W11
configure:4538: checking for X
configure:4603: gcc -E  conftest.c >/dev/null 2>conftest.out
configure:4679: gcc -o conftest -g -Wall
-Werror-implicit-function-declaration -fno-common -mtune=nocona -m64
-minline-all-stringops    -Wl,--export-dynamic  -L/usr/lib64 conftest.c -lXt 
1>&5
configure: In function 'main':
configure:4675: error: implicit declaration of function 'XtMalloc'
configure: failed program was:
#line 4672 "configure"
#include "confdefs.h"

int main() {
XtMalloc()
; return 0; }
configure:5346: checking whether to use Curses




> which implies that it isn't picking up the header. In fact, the
> relevant portion of the configure script is:
> 
> 	cat > conftest.$ac_ext <<EOF
> 	#line 4672 "configure"
> 	#include "confdefs.h"
> 	
> 	int main() {
> 	${x_direct_test_function}()
> 	; return 0; }
> 	EOF
> 
> which doesn't include any X headers.
> 
> Have you re-built your configure script using a different version of
> autoconf?
> 

Probably I added it in the debug output since I assumed that it was
there. So, after reset to CVS version, it turns out to be this problem:

configure:4675: error: implicit declaration of function 'XtMalloc'

probably still caused by the -Werror-implicit-function-declaration 
flag. Maybe the gcc behaviour changed? It is
 Target: x86_64-mandriva-linux-gnu
 gcc version 4.1.2 20070302 (prerelease) (4.1.2-1mdv2007.1)

On my office box (RHEL4, 64bit), it works with identical flags, but it is:
 Reading specs from /usr/lib/gcc/x86_64-redhat-linux/3.4.6/specs
 gcc version 3.4.6 20060404 (Red Hat 3.4.6-8)

I wonder why only this test fails.

Markus
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