X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/3e1979645df94f4aee04980ca483fdf8ec3c0011..d85949accc8820a54c468fbdf930063be5873296:/acmacro/compiler-flags.m4

diff --git a/acmacro/compiler-flags.m4 b/acmacro/compiler-flags.m4
index 951c59695f..9910dfdf11 100644
--- a/acmacro/compiler-flags.m4
+++ b/acmacro/compiler-flags.m4
@@ -1,37 +1,42 @@
-
-
 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
@@ -42,13 +47,15 @@ AC_DEFUN([SG_COMPILE_FLAGS],[
 
       ## -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
@@ -64,13 +71,15 @@ AC_DEFUN([SG_COMPILE_FLAGS],[
         *-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="$optCFLAGS -fno-loop-optimize"
@@ -82,6 +91,15 @@ AC_DEFUN([SG_COMPILE_FLAGS],[
     if test "x$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) 
   
 ])