CFLAGS_C99FSE=
CFLAGS_AUTO=
CFLAGS_MEMOPS=
+CFLAGS_NOSSP=
LDFLAGS_AUTO=
OPTIMIZE_GLOBS=
prefix=/usr/local/musl
optimize=auto
debug=no
warnings=no
-shared=yes
+shared=auto
static=yes
+wrapper=auto
for arg ; do
case "$arg" in
printf "%s\n" "$CC"
test -n "$CC" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
+printf "checking whether C compiler works... "
+echo "typedef int x;" > "$tmpc"
+if output=$($CC $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" 2>&1) ; then
+printf "yes\n"
+else
+printf "no; compiler output follows:\n%s\n" "$output"
+exit 1
+fi
+
#
-# Only build musl-gcc wrapper if toolchain does not already target musl
+# Need to know if the compiler is gcc to decide whether to build the
+# musl-gcc wrapper, and for critical bug detection in some gcc versions.
#
-if test -z "$wrapper" ; then
printf "checking whether compiler is gcc... "
-if fnmatch '*gcc\ version*' "$($CC -v 2>&1)" ; then
-echo yes
+if fnmatch '*gcc\ version*' "$(LC_ALL=C $CC -v 2>&1)" ; then
+cc_is_gcc=yes
+else
+cc_is_gcc=no
+fi
+echo "$cc_is_gcc"
+
+#
+# Only build musl-gcc wrapper if toolchain does not already target musl
+#
+if test "$wrapper" = auto ; then
printf "checking whether to build musl-gcc wrapper... "
+if test "$cc_is_gcc" = yes ; then
wrapper=yes
while read line ; do
case "$line" in */ld-musl-*) wrapper=no ;; esac
done <<EOF
$($CC -dumpspecs)
EOF
-echo $wrapper
else
-echo no
+wrapper=no
fi
+echo "$wrapper"
fi
# Catch these early to simplify matching for 32-bit archs
mips64*|powerpc64*) fail "$0: unsupported target \"$target\"" ;;
arm*) ARCH=arm ;;
+aarch64*) ARCH=aarch64 ;;
i?86*) ARCH=i386 ;;
-x86_64-x32*|x32*) ARCH=x32 ;;
+x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
x86_64*) ARCH=x86_64 ;;
mips*) ARCH=mips ;;
microblaze*) ARCH=microblaze ;;
+or1k*) ARCH=or1k ;;
powerpc*) ARCH=powerpc ;;
sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__="
fi
+#
+# Check for options to disable stack protector, which needs to be
+# disabled for a few early-bootstrap translation units. If not found,
+# this is not an error; we assume the toolchain does not do ssp.
+#
+tryflag CFLAGS_NOSSP -fno-stack-protector
+
#
# Check for options that may be needed to prevent the compiler from
# generating self-referential versions of memcpy,, memmove, memcmp,
tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns
#
-# If debugging is explicitly enabled, don't auto-enable optimizations
+# Enable debugging if requessted.
#
-if test "$debug" = yes ; then
-CFLAGS_AUTO=-g
-test "$optimize" = auto && optimize=no
-fi
+test "$debug" = yes && CFLAGS_AUTO=-g
#
# Possibly add a -O option to CFLAGS and select modules to optimize with
fi
# Some patched GCC builds have these defaults messed up...
-tryflag CFLAGS_AUTO -fno-stack-protector
tryldflag LDFLAGS_AUTO -Wl,--hash-style=both
+test "$shared" = "no" || {
# Disable dynamic linking if ld is broken and can't do -Bsymbolic-functions
LDFLAGS_DUMMY=
tryldflag LDFLAGS_DUMMY -Wl,-Bsymbolic-functions || {
+test "$shared" = "yes" && fail "$0: error: linker cannot build shared library"
printf "warning: disabling dynamic linking support\n"
shared=no
}
+}
# Find compiler runtime library
test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh
SUBARCH=
t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS_AUTO $CFLAGS"
+if test "$ARCH" = "x86_64" ; then
+trycppif __ILP32__ "$t" && ARCH=x32
+fi
+
if test "$ARCH" = "arm" ; then
trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
fi
+if test "$ARCH" = "aarch64" ; then
+trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
+fi
+
if test "$ARCH" = "mips" ; then
trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
if test "$ARCH" = "sh" ; then
trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
-if trycppif __SH_FPU_ANY__ "$t" ; then
+if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then
# Some sh configurations are broken and replace double with float
# rather than using softfloat when the fpu is present but only
# supports single precision. Reject them.
includedir = $includedir
syslibdir = $syslibdir
CC = $CC
-CFLAGS= $CFLAGS_AUTO $CFLAGS
+CFLAGS = $CFLAGS_AUTO $CFLAGS
CFLAGS_C99FSE = $CFLAGS_C99FSE
CFLAGS_MEMOPS = $CFLAGS_MEMOPS
+CFLAGS_NOSSP = $CFLAGS_NOSSP
CPPFLAGS = $CPPFLAGS
LDFLAGS = $LDFLAGS_AUTO $LDFLAGS
CROSS_COMPILE = $CROSS_COMPILE