X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=configure;h=707eb125648b626b584a621fed137f187e1a7548;hb=ed8696742504b6182954254e78ec123c8bcd8d3b;hp=248c45005eb0c3eeff2121a369572436c91aa67c;hpb=47314f1e6780bd561151c3241d4bcf7b861ed3ee;p=musl

diff --git a/configure b/configure
index 248c4500..707eb125 100755
--- a/configure
+++ b/configure
@@ -25,6 +25,7 @@ Fine tuning of the installation directories:
 System types:
   --target=TARGET         configure to run on target TARGET [detected]
   --host=HOST             same as --target
+  --build=BUILD           build system type; used only to infer cross-compiling
 
 Optional features:
   --enable-optimize=...   optimize listed components for speed over size [auto]
@@ -129,6 +130,7 @@ includedir='$(prefix)/include'
 syslibdir='/lib'
 tools=
 tool_libs=
+build=
 target=
 optimize=auto
 debug=no
@@ -170,8 +172,9 @@ case "$arg" in
 --disable-wrapper|--enable-wrapper=no) wrapper=no ;;
 --enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ; gcc_wrapper=yes ;;
 --disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;;
---enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
+--enable-*|--disable-*|--with-*|--without-*|--*dir=*) ;;
 --host=*|--target=*) target=${arg#*=} ;;
+--build=*) build=${arg#*=} ;;
 -* ) echo "$0: unknown option $arg" ;;
 CC=*) CC=${arg#*=} ;;
 CFLAGS=*) CFLAGS=${arg#*=} ;;
@@ -180,7 +183,7 @@ LDFLAGS=*) LDFLAGS=${arg#*=} ;;
 CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;;
 LIBCC=*) LIBCC=${arg#*=} ;;
 *=*) ;;
-*) target=$arg ;;
+*) build=$arg ; target=$arg ;;
 esac
 done
 
@@ -213,6 +216,15 @@ done
 set +C
 trap 'rm "$tmpc"' EXIT INT QUIT TERM HUP
 
+#
+# Check whether we are cross-compiling, and set a default
+# CROSS_COMPILE prefix if none was provided.
+#
+test "$target" && \
+test "$target" != "$build" && \
+test -z "$CROSS_COMPILE" && \
+CROSS_COMPILE="$target-"
+
 #
 # Find a C compiler to use
 #
@@ -299,15 +311,18 @@ printf "%s\n" "$target"
 #
 case "$target" in
 # 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-nt32*) ARCH=nt32 ;;
 i?86*) ARCH=i386 ;;
 x86_64-x32*|x32*|x86_64*x32) ARCH=x32 ;;
+x86_64-nt64*) ARCH=nt64 ;;
 x86_64*) ARCH=x86_64 ;;
+mips64*|mipsisa64*) ARCH=mips64 ;;
 mips*) ARCH=mips ;;
 microblaze*) ARCH=microblaze ;;
 or1k*) ARCH=or1k ;;
+powerpc64*) ARCH=powerpc64 ;;
 powerpc*) ARCH=powerpc ;;
 sh[1-9bel-]*|sh|superh*) ARCH=sh ;;
 unknown) fail "$0: unable to detect target arch; try $0 --target=..." ;;
@@ -588,6 +603,20 @@ fi
 if test "$ARCH" = "arm" ; then
 trycppif __ARMEB__ "$t" && SUBARCH=${SUBARCH}eb
 trycppif __ARM_PCS_VFP "$t" && SUBARCH=${SUBARCH}hf
+# Versions of clang up until at least 3.8 have the wrong constraint codes
+# for floating point operands to inline asm. Detect this so the affected
+# source files can just disable the asm.
+if test "$cc_family" = clang ; then
+printf "checking whether clang's vfp asm constraints work... "
+echo 'float f(float x) { __asm__("":"+t"(x)); return x; }' > "$tmpc"
+if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+printf "yes\n"
+else
+printf "no\n"
+CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_VFP_ASM"
+CFLAGS_AUTO="${CFLAGS_AUTO# }"
+fi
+fi
 fi
 
 if test "$ARCH" = "aarch64" ; then
@@ -595,13 +624,33 @@ trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be
 fi
 
 if test "$ARCH" = "mips" ; then
+trycppif "__mips_isa_rev >= 6" "$t" && SUBARCH=${SUBARCH}r6
+trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
+trycppif __mips_soft_float "$t" && SUBARCH=${SUBARCH}-sf
+fi
+
+if test "$ARCH" = "mips64" ; then
+trycppif "_MIPS_SIM != _ABI64" "$t" && ARCH=mipsn32
+trycppif "__mips_isa_rev >= 6" "$t" && SUBARCH=${SUBARCH}r6
 trycppif "_MIPSEL || __MIPSEL || __MIPSEL__" "$t" && SUBARCH=${SUBARCH}el
 trycppif __mips_soft_float "$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=${SUBARCH}-sf
+fi
+
 test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
 && SUBARCH=${SUBARCH}el
 
+if test "$ARCH" = "powerpc64" ; then
+trycppif "_CALL_ELF == 2" "$t" || fail "$0: error: unsupported powerpc64 ABI"
+trycppif __LITTLE_ENDIAN__ "$t" && SUBARCH=${SUBARCH}le
+trycppif _SOFT_FLOAT "$t" && fail "$0: error: soft-float not supported on powerpc64"
+fi
+
 if test "$ARCH" = "sh" ; then
 tryflag CFLAGS_AUTO -Wa,--isa=any
 trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb
@@ -655,6 +704,16 @@ printf "no\n"
 fail "$0: error: unsupported long double type"
 fi
 
+#
+# Some build systems globally pass in broken CFLAGS like -ffast-math
+# for all packages. On recent GCC we can detect this and error out
+# early rather than producing a seriously-broken math library.
+#
+if trycppif "__FAST_MATH__" \
+  "$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" ; then
+fail "$0: error: compiler has broken floating point; check CFLAGS"
+fi
+
 printf "creating config.mak... "
 
 cmdline=$(quote "$0")