X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=configure;h=853bf05e8cb6499dd3b48bd62b6c425330c5c6d0;hb=aebd6a36449e91c06763a40121d558b6cea90d50;hp=a5231a0ebb73c6cec2af9a3a25dfe192b7b5b45c;hpb=d046ec92c1e5a487a8f9d584ebb79c3bc97ea95f;p=musl

diff --git a/configure b/configure
index a5231a0e..853bf05e 100755
--- a/configure
+++ b/configure
@@ -353,6 +353,14 @@ tryflag CFLAGS_C99FSE -fexcess-precision=standard \
 || { test "$ARCH" = i386 && tryflag CFLAGS_C99FSE -ffloat-store ; }
 tryflag CFLAGS_C99FSE -frounding-math
 
+#
+# Semantically we want to insist that our sources follow the
+# C rules for type-based aliasing, but most if not all real-world
+# compilers are known or suspected to have critical bugs in their
+# type-based aliasing analysis. See for example GCC bug 107107.
+#
+tryflag CFLAGS_C99FSE -fno-strict-aliasing
+
 #
 # We may use the may_alias attribute if __GNUC__ is defined, so
 # if the compiler defines __GNUC__ but does not provide it,
@@ -409,7 +417,7 @@ test "$debug" = yes && CFLAGS_AUTO=-g
 #
 printf "checking whether we should preprocess assembly to add debugging information... "
 if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" &&
-   test -f "tools/add-cfi.$ARCH.awk" &&
+   test -f "$srcdir/tools/add-cfi.$ARCH.awk" &&
    printf ".file 1 \"srcfile.s\"\n.line 1\n.cfi_startproc\n.cfi_endproc" | $CC -g -x assembler -c -o /dev/null 2>/dev/null -
 then
   ADD_CFI=yes
@@ -671,9 +679,7 @@ trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
 fi
 
 if test "$ARCH" = "powerpc" ; then
-trycppif "__NO_FPRS__ && !_SOFT_FLOAT" "$t" && fail \
-  "$0: error: compiler's floating point configuration is unsupported"
-trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
+trycppif "_SOFT_FLOAT || __NO_FPRS__" "$t" && SUBARCH=${SUBARCH}-sf
 printf "checking whether compiler can use 'd' constraint in asm... "
 echo 'double f(double x) { __asm__ ("fabs %0, %1" : "=d"(x) : "d"(x)); return x; }' > "$tmpc"
 if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
@@ -725,11 +731,6 @@ fi
 test "$SUBARCH" \
 && printf "configured for %s variant: %s\n" "$ARCH" "$ARCH$SUBARCH"
 
-case "$ARCH$SUBARCH" in
-arm) ASMSUBARCH=el ;;
-*) ASMSUBARCH=$SUBARCH ;;
-esac
-
 #
 # Some archs (powerpc) have different possible long double formats
 # that the compiler can be configured for. The logic for whether this