X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=stepmake%2Faclocal.m4;h=682b6b1bd15e22504106c520493900346a541f34;hb=c20fff645e325d392d2588721144f4204d0ef9da;hp=8be2cab11dbe82218add1190679c27782c3b57b8;hpb=2f0c6eb19208485a86d3416db3f3640a1d54752a;p=lilypond.git

diff --git a/stepmake/aclocal.m4 b/stepmake/aclocal.m4
index 8be2cab11d..682b6b1bd1 100644
--- a/stepmake/aclocal.m4
+++ b/stepmake/aclocal.m4
@@ -287,12 +287,16 @@ AC_DEFUN(STEPMAKE_CXXTEMPLATE, [
 ])
 
 AC_DEFUN(STEPMAKE_GXXCODEGENBUG, [
-    AC_MSG_CHECKING([options for known g++ tail call bug])
+    AC_MSG_CHECKING([options for known g++ bugs])
     case "$GXX:$CXX_VERSION" in
-	yes:400600?)
-	    AC_MSG_RESULT([-fno-optimize-sibling-calls])
+	yes:400600[[0-2]])
+	    AC_MSG_RESULT([-fno-optimize-sibling-calls (tail call bug)])
 	    CXXFLAGS="$CXXFLAGS -fno-optimize-sibling-calls"
 	    ;;
+	yes:400700?)
+	    AC_MSG_RESULT([-fno-tree-vrp (comparison bug)])
+	    CXXFLAGS="$CXXFLAGS -fno-tree-vrp"
+	    ;;
 	*) AC_MSG_RESULT([none])
     esac
     AC_SUBST(CXXFLAGS)
@@ -1031,7 +1035,11 @@ AC_DEFUN(STEPMAKE_PYTHON_DEVEL, [
         # Clean out junk: http://bugs.python.org/issue3290
 	# Python headers may need some -f* flags, leave them in.
 	# We want the sed commands to look like 's/-[WDOm][[:alnum:][:punct:]][[:alnum:][:punct:]]*//g' and 's/-arch [^[:space:]]*//g', but automake eats brackets.
-	PYTHON_CFLAGS=`$PYTHON_CONFIG --cflags | sed -e 's/-[[WDOm]][[[:alnum:][:punct:]]][[[:alnum:][:punct:]]]*//g' | sed -e 's/-arch @<:@^@<:@:space:@:>@@:>@*//g'`
+	 #PYTHON_CFLAGS=`$PYTHON_CONFIG --cflags | sed -e 's/-[[WDOm]][[[:alnum:][:punct:]]][[[:alnum:][:punct:]]]*//g' | sed -e 's/-arch @<:@^@<:@:space:@:>@@:>@*//g'`
+	 # The above sed BRE matches parts of legal options, stipping down part of that option, resulting in invalid gcc arguments. Gentoo Bug #415793
+	 # For instance, '-floop-stip-mime' becomes '-floop-strip', and '-fvect-cost-model' becomes '-fvect-cost'.
+	 # Tentative fix to require a non alphanumeric character before the initial hyphen of the BRE or the hyphen being the first character in the string.
+	 PYTHON_CFLAGS=`$PYTHON_CONFIG --cflags | sed -e 's/\(^\|[[^[:alnum:]]]\)-[[WDOm]][[[:alnum:][:punct:]]][[[:alnum:][:punct:]]]*//g' | sed -e 's/-arch @<:@^@<:@:space:@:>@@:>@*//g'`
 	PYTHON_LDFLAGS=`$PYTHON_CONFIG --ldflags`
     fi