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Back-port HEAD's configure fixes to select appropriate compiler switches

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for Intel's icc and AIX's xlc.
This commit is contained in:
Tom Lane
2006-08-07 20:08:44 +00:00
parent e33ab5b6d5
commit 804e7c5c53
2 changed files with 198 additions and 14 deletions
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32
configure.in
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@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.431.2.12 2006/07/11 16:15:03 tgl Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.431.2.13 2006/08/07 20:08:43 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -250,16 +250,34 @@ else
fi
fi
if test "$GCC" = yes; then
CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wpointer-arith -Winline"
# Some versions of GCC support some additional useful warning flags.
# Check whether they are supported, and add them to CFLAGS if so.
# Some versions of GCC support some additional useful warning flags.
# Check whether they are supported, and add them to CFLAGS if so.
PGAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
PGAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
if test "$GCC" = yes; then
# ICC pretends to be GCC but it's lying; it doesn't support these options.
# So we have to check if "GCC" is really ICC.
AC_TRY_COMPILE([], [@%:@ifndef __INTEL_COMPILER
choke me
@%:@endif], [ICC=[yes]], [ICC=[no]])
if test "$ICC" = no; then
CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wpointer-arith -Winline"
PGAC_PROG_CC_CFLAGS_OPT([-Wdeclaration-after-statement])
PGAC_PROG_CC_CFLAGS_OPT([-Wendif-labels])
else
# Intel compiler has a bug/misoptimization in checking for
# division by NAN (NaN == 0), -mp1 fixes it, so add it to the
# CFLAGS.
PGAC_PROG_CC_CFLAGS_OPT([-mp1])
fi
# Disable strict-aliasing rules; needed for gcc 3.3+
PGAC_PROG_CC_CFLAGS_OPT([-fno-strict-aliasing])
elif test x"${CC}" = x"xlc"; then
# AIX xlc has to have strict aliasing turned off too
PGAC_PROG_CC_CFLAGS_OPT([-qnoansialias])
fi
# supply -g if --enable-debug