+++ /dev/null
-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=$enableval,enable_compile_warnings=no)
-
- AC_ARG_ENABLE(compile-optimizations,
- AS_HELP_STRING([--disable-compile-optimizations], [use compiler optimizations (default=yes, unless if CFLAGS is explicitly set)]),
- enable_compile_optimizations=$enableval,enable_compile_optimizations=auto)
-
- # AC PROG CC tests whether -g is accepted.
- # 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
-
- 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
- case " $CFLAGS " in
- *-Wall*) ;;
- *) warnCFLAGS="-Wall -Wunused" ;;
- esac
-
- ## -W is not all that useful. And it cannot be controlled
- ## with individual -Wno-xxx flags, unlike -Wall
-
- ## -Wformat=2 chokes on the snprintf replacement because the format is passed to real sprintf
- ## -Wshadow chokes on try{ try{} } constructs
- warnCFLAGS=`echo $warnCFLAGS -Wmissing-prototypes -Wmissing-declarations \
- -Wpointer-arith -Wchar-subscripts -Wcomment -Wformat -Wwrite-strings \
- -Wno-unused-function -Wno-unused-parameter -Wno-strict-aliasing -Wno-format-nonliteral \
- -Werror \
- | sed 's/ +/ /g'`
- # -Wno-unused-variable -Wno-unused-label
- fi
- AC_MSG_RESULT($warnCFLAGS)
- # placed before since gcc remembers the last one on conflict
- CFLAGS="$warnCFLAGS $CFLAGS"
- fi
-
- if test "x$enable_compile_optimizations" = "xyes" ||
- test "x$enable_compile_optimizations" = "xauto" ; then
- AC_MSG_CHECKING(the optimization flags for this compiler)
- optCFLAGS=
- if test "x$CC" = "xgcc" || test "x$GCC" = "xyes" ; then
- case " $CFLAGS " in
- *-O*) ;;
- *) optCFLAGS="$optCFLAGS -O3" ;;
- esac
- 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$GCC_VER_MAJ" == "x3" ; then
- # avoid gcc bug #12828, which apeared in 3.x branch and is fixed in 3.4.0
- # but the check would be too complicated to get 3.4.
- # Instead, rule out any 3.x compiler.
-
- # Note that the flag didn't exist before gcc 3.0
- optCFLAGS="$optCFLAGS -fno-loop-optimize"
- fi
- dnl A C_MSG_WARN(GCC_VER_MAJ=$GCC_VER_MAJ)
- fi
- AC_MSG_RESULT($optCFLAGS)
- # Take it only if CFLAGS not explicitly set. Unless the flag was explicitly given
- 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)
-
-])
