-
-
dnl SG_COMPILE_FLAGS
dnl Turn on many useful compiler warnings
dnl For now, only sets extra flags on GCC
+
+dnl Copyright (C) 2004, 2005, 2007. Martin Quinson. All rights reserved.
+
+dnl This file is part of the SimGrid project. This is free software:
+dnl You can redistribute and/or modify it under the terms of the
+dnl GNU LGPL (v2.1) licence.
+
+
AC_DEFUN([SG_COMPILE_FLAGS],[
AC_ARG_ENABLE(compile-warnings,
AS_HELP_STRING([--enable-compile-warnings], [use compiler warnings (default=no, unless in maintainer mode)]),
- enable_compile_warnings=$withval,enable_compile_warnings=no)
+ enable_compile_warnings=$enableval,enable_compile_warnings=no)
AC_ARG_ENABLE(compile-optimizations,
AS_HELP_STRING([--disable-compile-optimizations], [use compiler optimizations (default=yes, unless if CFLAGS is explicitly set)]),
enable_compile_optimizations=$enableval,enable_compile_optimizations=auto)
- if test "x$cflags_set" != "xyes" ; then
- # if user didn't specify CFLAGS explicitely
-
# AC PROG CC tests whether -g is accepted.
- # Cool, but it also tries to set -O2. I don't want it with gcc
- saveCFLAGS="$CFLAGS"
- CFLAGS=
- case " $saveCFLAGS " in
- *-g*) CFLAGS="-g" ;;
- esac
- case " $saveCFLAGS " in
- *-O2*) test "x$CC" = xgcc || CFLAGS="$CFLAGS -O2" ;;
+ # Cool, but it also tries to set -O2 and -g.
+ # I don't want it with gcc, but -O3 and -g2, and optimization only when asked by user
+ case $CC in
+ *gcc)
+ if test "$CFLAGS" = "-g -O2" ; then
+ CFLAGS="-g3"
+ fi
+ if test "$CXXFLAGS" = "-g -O2" ; then
+ CXXFLAGS="-g3"
+ fi
+ if test "$GCJFLAGS" = "-g -O2" ; then
+ CXXFLAGS="-g3"
+ fi;;
esac
-
- # damn AC PROG CC, why did you set -O??
- CFLAGS="-g"
- fi
- if test "x$enable_compile_warnings" = "xyes" ; then
+ if test "x$enable_compile_warnings" = "xyes" ||
+ test "x$force_compile_warnings" = "xyes"; then
AC_MSG_CHECKING(the warning flags for this compiler)
warnCFLAGS=
if test "x$CC" = "xgcc" || test "x$GCC" = "xyes" ; then
## -W is not all that useful. And it cannot be controlled
## with individual -Wno-xxx flags, unlike -Wall
- if test "x$enable_compile_warnings" = "xyes"; then
- warnCFLAGS=`echo $warnCFLAGS -Wmissing-prototypes -Wmissing-declarations \
- -Wshadow -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat=2 -Wwrite-strings \
- -Wno-unused-variable -Wno-unused-function -Wno-unused-label \
+
+ ## -Wformat=2 chokes on the snprintf replacement because the format is passed to real sprintf
+ ## -Wshadow chokes on try{ try{} } constructs
+ warnCFLAGS=`echo $warnCFLAGS -Wmissing-prototypes -Wmissing-declarations \
+ -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings \
+ -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing -Wno-format-nonliteral \
-Werror \
| sed 's/ +/ /g'`
- fi
+ # -Wno-unused-variable -Wno-unused-label
fi
AC_MSG_RESULT($warnCFLAGS)
# placed before since gcc remembers the last one on conflict
*-O*) ;;
*) optCFLAGS="$optCFLAGS -O3" ;;
esac
- optCFLAGS="$optCFLAGS -finline-functions -ffast-math -funroll-loops -fno-strict-aliasing"
+ optCFLAGS="$optCFLAGS -finline-functions -funroll-loops -fno-strict-aliasing"
+ # now that surf uses advanced maths in lagrangian, -ffast-math do break things
GCC_VER=`gcc --version | head -n 1 | sed 's/^[^0-9]*\([^ ]*\).*$/\1/'`
GCC_VER_MAJ=`echo $GCC_VER | sed 's/^\(.\).*$/\1/'`
- if test "x$target_cpu" = "xpowerpc" && test "x$GCC_VER_MAJ" != "x2" ; then
- # avoid gcc bug #12828, which is fixed in 3.4.0, but this version
- # isn't propagated enough to desserve an extra check
+ if test "x$target_cpu" = "xpowerpc" && test "x$GCC_VER_MAJ" == "x3" ; then
+ # avoid gcc bug #12828, which apeared in 3.x branch and is fixed in 3.4.0
+ # but the check would be too complicated to get 3.4.
+ # Instead, rule out any 3.x compiler.
# Note that the flag didn't exist before gcc 3.0
optCFLAGS="$optCFLAGS -fno-loop-optimize"
if test "x$cflags_set" != "xyes" ; then
CFLAGS="$optCFLAGS $CFLAGS"
fi
+ else
+ CFLAGS="$CFLAGS -O0"
+ fi
+
+ if test x$lt_cv_prog_gnu_ld = xyes ; then
+ LD_DYNAMIC_FLAGS=-Wl,--export-dynamic
+ else
+ LD_DYNAMIC_FLAGS=
fi
+ AC_SUBST(LD_DYNAMIC_FLAGS)
])
