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Commit105907f

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Put in defense against gcc -ffast-math.
1 parent316d4e2 commit105907f

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2 files changed

+57
-1
lines changed

2 files changed

+57
-1
lines changed

‎configure‎

Lines changed: 47 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2442,6 +2442,7 @@ if test "$enable_debug" = yes && test "$ac_cv_prog_cc_g" = yes; then
24422442
fi
24432443
{echo"$as_me:$LINENO: using CFLAGS=$CFLAGS">&5
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echo"$as_me: using CFLAGS=$CFLAGS">&6;}
2445+
24452446
# Check if the compiler still works with the template settings
24462447
echo"$as_me:$LINENO: checking whether the C compiler still works">&5
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echo$ECHO_N"checking whether the C compiler still works...$ECHO_C">&6
@@ -2488,6 +2489,52 @@ echo "$as_me: error: cannot proceed" >&2;}
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{ (exit 1);exit 1; }; }
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fi
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rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
2492+
2493+
# Defend against gcc -ffastmath
2494+
iftest"$GCC" = yes;then
2495+
cat>conftest.$ac_ext<<_ACEOF
2496+
#line$LINENO "configure"
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#include "confdefs.h"
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2499+
#ifdef F77_DUMMY_MAIN
2500+
# ifdef __cplusplus
2501+
extern "C"
2502+
# endif
2503+
int F77_DUMMY_MAIN() { return 1; }
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#endif
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int
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main ()
2507+
{
2508+
#ifdef __FAST_MATH__
2509+
choke me
2510+
#endif
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;
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return 0;
2513+
}
2514+
_ACEOF
2515+
rm -f conftest.$ac_objext
2516+
if { (evalecho"$as_me:$LINENO:\"$ac_compile\"")>&5
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(eval$ac_compile)2>&5
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ac_status=$?
2519+
echo"$as_me:$LINENO:\$? =$ac_status">&5
2520+
(exit$ac_status); }&&
2521+
{ ac_try='test -s conftest.$ac_objext'
2522+
{ (evalecho"$as_me:$LINENO:\"$ac_try\"")>&5
2523+
(eval$ac_try)2>&5
2524+
ac_status=$?
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echo"$as_me:$LINENO:\$? =$ac_status">&5
2526+
(exit$ac_status); }; };then
2527+
:
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else
2529+
echo"$as_me: failed program was:">&5
2530+
cat conftest.$ac_ext>&5
2531+
{ {echo"$as_me:$LINENO: error: do not put -ffast-math in CFLAGS">&5
2532+
echo"$as_me: error: do not put -ffast-math in CFLAGS">&2;}
2533+
{ (exit 1);exit 1; }; }
2534+
fi
2535+
rm -f conftest.$ac_objext conftest.$ac_ext
2536+
fi
2537+
24912538
ac_ext=c
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ac_cpp='$CPP $CPPFLAGS'
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ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'

‎configure.in‎

Lines changed: 10 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
dnl Process this file with autoconf to produce a configure script.
2-
dnl $Header: /cvsroot/pgsql/configure.in,v 1.209 2002/09/17 04:27:41 momjian Exp $
2+
dnl $Header: /cvsroot/pgsql/configure.in,v 1.210 2002/09/20 18:38:57 petere Exp $
33
dnl
44
dnl Developers, please strive to achieve this order:
55
dnl
@@ -253,12 +253,21 @@ if test "$enable_debug" = yes && test "$ac_cv_prog_cc_g" = yes; then
253253
CFLAGS="$CFLAGS -g"
254254
fi
255255
AC_MSG_NOTICE([using CFLAGS=$CFLAGS])
256+
256257
# Check if the compiler still works with the template settings
257258
AC_MSG_CHECKING([whether the C compiler still works])
258259
AC_TRY_LINK([], [return 0;],
259260
[AC_MSG_RESULT(yes)],
260261
[AC_MSG_RESULT(no)
261262
AC_MSG_ERROR([cannot proceed])])
263+
264+
# Defend against gcc -ffastmath
265+
if test "$GCC" = yes; then
266+
AC_TRY_COMPILE([], [@%:@ifdef __FAST_MATH__
267+
choke me
268+
@%:@endif], [], [AC_MSG_ERROR([do not put -ffast-math in CFLAGS])])
269+
fi
270+
262271
AC_PROG_CPP
263272
AC_SUBST(GCC)
264273

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