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re PR bootstrap/26055 (libgcc-math declaration of __isinf conflicts with system header, fails bootstrap)

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2006-02-01  Richard Guenther  <rguenther@suse.de>

        PR bootstrap/26055
	* configure.ac: Disable libgcc-math if we cannot mix
	declaration of __isinf and math.h inclusion.
	* configure: Re-generate.

From-SVN: r110469
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Richard Guenther 2006-02-01 10:30:43 +00:00 • committed by Richard Biener
parent 916b63c371
commit 36cbd091c5
3 changed files with 99 additions and 0 deletions
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7
libgcc-math/ChangeLog
View file

@ -1,3 +1,10 @@
2006-02-01 Richard Guenther <rguenther@suse.de>
PR bootstrap/26055
* configure.ac: Disable libgcc-math if we cannot mix
declaration of __isinf and math.h inclusion.
* configure: Re-generate.
2006-01-31 Richard Guenther <rguenther@suse.de>
Paolo Bonzini <bonzini@gnu.org>

70
libgcc-math/configure vendored
View file

@ -4573,6 +4573,73 @@ else
fi
# Check for target library dependencies
cannot_build=no
echo "$as_me:$LINENO: checking whether math.h conflicts with defining __isinf" >&5
echo $ECHO_N "checking whether math.h conflicts with defining __isinf... $ECHO_C" >&6
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include "math.h"
int __isinf (double x)
{
}
int
main ()
{
return __isinf (1.0);
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
(eval $ac_link) 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag"
|| test ! -s conftest.err'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
cannot_build=yes
fi
rm -f conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
# Now check which parts we include in the library.
arch_subdirs=
@ -4590,6 +4657,9 @@ esac
if test "$cannot_build" = "yes"; then
arch_subdirs=
fi
if test "x$arch_subdirs" != x; then

22
libgcc-math/configure.ac
View file

@ -124,6 +124,25 @@ else
fi
# Check for target library dependencies
cannot_build=no
AC_MSG_CHECKING([whether math.h conflicts with defining __isinf])
AC_TRY_LINK([
#include "math.h"
int __isinf (double x)
{
}
], [
return __isinf (1.0);
], [
AC_MSG_RESULT([no])
], [
AC_MSG_RESULT([yes])
cannot_build=yes
])
# Now check which parts we include in the library.
arch_subdirs=
@ -141,6 +160,9 @@ esac
AC_SUBST(arch_subdirs)
AC_SUBST(arch_libraries)
AC_SUBST(arch_maps)
if test "$cannot_build" = "yes"; then
arch_subdirs=
fi
AM_CONDITIONAL(BUILD_LIBGCC_MATH, [test "x$arch_subdirs" != x])