X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=configure;h=8680128113aa868c56e23d7c8dab7c61f7891098;hb=1ef37aa00ea830dfda76e04e3d941cafa74d8b76;hp=b6b6f894f0caefa6cb529c154bccec32b118ed22;hpb=b3cd7d13fe630ba1847326242525298e361018c1;p=musl diff --git a/configure b/configure index b6b6f894..86801281 100755 --- a/configure +++ b/configure @@ -9,6 +9,9 @@ VAR=VALUE. See below for descriptions of some of the useful variables. Defaults for the options are specified in brackets. +Configuration: + --srcdir=DIR source directory [detected] + Installation directories: --prefix=PREFIX main installation prefix [/usr/local/musl] --exec-prefix=EPREFIX installation prefix for executable files [PREFIX] @@ -22,12 +25,12 @@ 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] --enable-debug build with debugging information [disabled] --enable-warnings build with recommended warnings flags [disabled] - --enable-visibility use global visibility options to optimize PIC [auto] --enable-wrapper=... build given musl toolchain wrapper [auto] --disable-shared inhibit building shared library [enabled] --disable-static inhibit building static library [enabled] @@ -117,6 +120,7 @@ CFLAGS_TRY= LDFLAGS_AUTO= LDFLAGS_TRY= OPTIMIZE_GLOBS= +srcdir= prefix=/usr/local/musl exec_prefix='$(prefix)' bindir='$(exec_prefix)/bin' @@ -125,19 +129,21 @@ includedir='$(prefix)/include' syslibdir='/lib' tools= tool_libs= +build= target= optimize=auto debug=no warnings=no -visibility=auto shared=auto static=yes wrapper=auto gcc_wrapper=no +clang_wrapper=no for arg ; do case "$arg" in ---help) usage ;; +--help|-h) usage ;; +--srcdir=*) srcdir=${arg#*=} ;; --prefix=*) prefix=${arg#*=} ;; --exec-prefix=*) exec_prefix=${arg#*=} ;; --bindir=*) bindir=${arg#*=} ;; @@ -155,17 +161,19 @@ case "$arg" in --disable-debug|--enable-debug=no) debug=no ;; --enable-warnings|--enable-warnings=yes) warnings=yes ;; --disable-warnings|--enable-warnings=no) warnings=no ;; ---enable-visibility|--enable-visibility=yes) visibility=yes ;; ---disable-visibility|--enable-visibility=no) visibility=no ;; --enable-wrapper|--enable-wrapper=yes) wrapper=detect ;; ---enable-wrapper=all) wrapper=yes ; gcc_wrapper=yes ;; +--enable-wrapper=all) wrapper=yes ; gcc_wrapper=yes ; clang_wrapper=yes ;; --enable-wrapper=gcc) wrapper=yes ; gcc_wrapper=yes ;; +--enable-wrapper=clang) wrapper=yes ; clang_wrapper=yes ;; --disable-wrapper|--enable-wrapper=no) wrapper=no ;; --enable-gcc-wrapper|--enable-gcc-wrapper=yes) wrapper=yes ; gcc_wrapper=yes ;; --disable-gcc-wrapper|--enable-gcc-wrapper=no) wrapper=no ;; ---enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;; +--enable-*|--disable-*|--with-*|--without-*|--*dir=*) ;; --host=*|--target=*) target=${arg#*=} ;; +--build=*) build=${arg#*=} ;; -* ) echo "$0: unknown option $arg" ;; +AR=*) AR=${arg#*=} ;; +RANLIB=*) RANLIB=${arg#*=} ;; CC=*) CC=${arg#*=} ;; CFLAGS=*) CFLAGS=${arg#*=} ;; CPPFLAGS=*) CPPFLAGS=${arg#*=} ;; @@ -173,14 +181,26 @@ LDFLAGS=*) LDFLAGS=${arg#*=} ;; CROSS_COMPILE=*) CROSS_COMPILE=${arg#*=} ;; LIBCC=*) LIBCC=${arg#*=} ;; *=*) ;; -*) target=$arg ;; +*) build=$arg ; target=$arg ;; esac done -for i in prefix exec_prefix bindir libdir includedir syslibdir ; do +for i in srcdir prefix exec_prefix bindir libdir includedir syslibdir ; do stripdir $i done +# +# Get the source dir for out-of-tree builds +# +if test -z "$srcdir" ; then +srcdir="${0%/configure}" +stripdir srcdir +fi +abs_builddir="$(pwd)" || fail "$0: cannot determine working directory" +abs_srcdir="$(cd $srcdir && pwd)" || fail "$0: invalid source directory $srcdir" +test "$abs_srcdir" = "$abs_builddir" && srcdir=. +test "$srcdir" != "." -a -f Makefile -a ! -h Makefile && fail "$0: Makefile already exists in the working directory" + # # Get a temp filename we can use # @@ -194,6 +214,15 @@ done set +C trap 'rm "$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="$target-" + # # Find a C compiler to use # @@ -218,6 +247,7 @@ fi # tryflag CFLAGS_TRY -Werror=unknown-warning-option tryflag CFLAGS_TRY -Werror=unused-command-line-argument +tryflag CFLAGS_TRY -Werror=ignored-optimization-argument tryldflag LDFLAGS_TRY -Werror=unknown-warning-option tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument @@ -230,6 +260,8 @@ cc_ver="$(LC_ALL=C $CC -v 2>&1)" cc_family=unknown if fnmatch '*gcc\ version*' "$cc_ver" ; then cc_family=gcc +elif fnmatch '*clang\ version*' "$cc_ver" ; then +cc_family=clang fi echo "$cc_family" @@ -237,17 +269,19 @@ echo "$cc_family" # Figure out toolchain wrapper to build # if test "$wrapper" = auto -o "$wrapper" = detect ; then +echo "#include " > "$tmpc" +echo "#if ! __GLIBC__" >> "$tmpc" +echo "#error no" >> "$tmpc" +echo "#endif" >> "$tmpc" printf "checking for toolchain wrapper to build... " -if test "$cc_family" = gcc ; then +if test "$wrapper" = auto && ! $CC -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then +echo "none" +elif test "$cc_family" = gcc ; then gcc_wrapper=yes -if test "$wrapper" = auto ; then -while read line ; do -case "$line" in */ld-musl-*) gcc_wrapper=no ;; esac -done </dev/null 2>&1 ; then printf "no\n" else @@ -320,6 +363,13 @@ printf "yes\n" CFLAGS_C99FSE="$CFLAGS_C99FSE -D__may_alias__=" fi +# +# The GNU toolchain defaults to assuming unmarked files need an +# executable stack, potentially exposing vulnerabilities in programs +# linked with such object files. Fix this. +# +tryflag CFLAGS_C99FSE -Wa,--noexecstack + # # Check for options to disable stack protector, which needs to be # disabled for a few early-bootstrap translation units. If not found, @@ -341,6 +391,22 @@ tryflag CFLAGS_MEMOPS -fno-tree-loop-distribute-patterns # test "$debug" = yes && CFLAGS_AUTO=-g +# +# Preprocess asm files to add extra debugging information if debug is +# enabled, our assembler supports the needed directives, and the +# preprocessing script has been written for our architecture. +# +printf "checking whether we should preprocess assembly to add debugging information... " +if fnmatch '-g*|*\ -g*' "$CFLAGS_AUTO $CFLAGS" && + test -f "tools/add-cfi.$ARCH.awk" && + printf ".file 1 \"srcfile.s\"\n.line 1\n.cfi_startproc\n.cfi_endproc" | $CC -g -x assembler -c -o /dev/null 2>/dev/null - +then + ADD_CFI=yes +else + ADD_CFI=no +fi +printf "%s\n" "$ADD_CFI" + # # Possibly add a -O option to CFLAGS and select modules to optimize with # -O3 based on the status of --enable-optimize and provided CFLAGS. @@ -405,11 +471,15 @@ tryflag CFLAGS_AUTO -fno-unwind-tables tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables # -# The GNU toolchain defaults to assuming unmarked files need an -# executable stack, potentially exposing vulnerabilities in programs -# linked with such object files. Fix this. +# Attempt to put each function and each data object in its own +# section. This both allows additional size optimizations at link +# time and works around a dangerous class of compiler/assembler bugs +# whereby relative address expressions are constant-folded by the +# assembler even when one or more of the symbols involved is +# replaceable. See gas pr 18561 and gcc pr 66609, 68178, etc. # -tryflag CFLAGS_AUTO -Wa,--noexecstack +tryflag CFLAGS_AUTO -ffunction-sections +tryflag CFLAGS_AUTO -fdata-sections # # On x86, make sure we don't have incompatible instruction set @@ -435,6 +505,13 @@ tryflag CFLAGS_AUTO -Werror=implicit-int tryflag CFLAGS_AUTO -Werror=pointer-sign tryflag CFLAGS_AUTO -Werror=pointer-arith +# +# GCC ignores unused arguements by default, but Clang needs this extra +# parameter to stop printing warnings about LDFLAGS passed during +# compiling stage and CFLAGS passed during linking stage. +# +test "$cc_family" = clang && tryflag CFLAGS_AUTO -Qunused-arguments + if test "x$warnings" = xyes ; then tryflag CFLAGS_AUTO -Wall tryflag CFLAGS_AUTO -Wno-parentheses @@ -446,47 +523,51 @@ tryflag CFLAGS_AUTO -Wno-unknown-pragmas tryflag CFLAGS_AUTO -Wno-pointer-to-int-cast fi -if test "x$visibility" = xauto ; then -# This test checks toolchain support for several things: -# - the -include option -# - the attributes/pragmas used in vis.h -# - linking code that takes the address of protected symbols -printf "checking whether global visibility preinclude works... " -echo 'int (*fp)(void);' > "$tmpc" -echo 'int foo(void) { }' >> "$tmpc" -echo 'int bar(void) { fp = foo; return foo(); }' >> "$tmpc" -if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS \ - -DSHARED -fPIC -I./src/internal -include vis.h \ - -nostdlib -shared -Wl,-Bsymbolic-functions \ - -o /dev/null "$tmpc" >/dev/null 2>&1 ; then -visibility=yes +# Determine if the compiler produces position-independent code (PIC) +# by default. If so, we don't need to compile separate object files +# for libc.a and libc.so. +if trycppif __PIC__ "$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" ; then +pic_default=yes else -visibility=no -fi -printf "%s\n" "$visibility" +pic_default=no fi -if test "x$visibility" = xyes ; then -CFLAGS_AUTO="$CFLAGS_AUTO -include vis.h" -CFLAGS_AUTO="${CFLAGS_AUTO# }" -fi +# Reduce space lost to padding for alignment purposes by sorting data +# objects according to their alignment reqirements. This approximates +# optimal packing. +tryldflag LDFLAGS_AUTO -Wl,--sort-section,alignment +tryldflag LDFLAGS_AUTO -Wl,--sort-common + +# When linking shared library, drop dummy weak definitions that were +# replaced by strong definitions from other translation units. +tryldflag LDFLAGS_AUTO -Wl,--gc-sections # Some patched GCC builds have these defaults messed up... tryldflag LDFLAGS_AUTO -Wl,--hash-style=both -test "$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 "$0: error: linker cannot build shared library" -printf "warning: disabling dynamic linking support\n" -shared=no -} -} +# Prevent linking if there are undefined symbols; if any exist, +# libc.so will crash at runtime during relocation processing. +# The common way this can happen is failure to link the compiler +# runtime library; implementation error is also a possibility. +tryldflag LDFLAGS_AUTO -Wl,--no-undefined + +# Avoid exporting symbols from compiler runtime libraries. They +# should be hidden anyway, but some toolchains including old gcc +# versions built without shared library support and pcc are broken. +tryldflag LDFLAGS_AUTO -Wl,--exclude-libs=ALL + +# Public data symbols must be interposable to allow for copy +# relocations, but otherwise we want to bind symbols at libc link +# time to eliminate startup relocations and PLT overhead. Use +# --dynamic-list rather than -Bsymbolic-functions for greater +# control over what symbols are left unbound. +tryldflag LDFLAGS_AUTO -Wl,--dynamic-list="$srcdir/dynamic.list" # Find compiler runtime library test -z "$LIBCC" && tryldflag LIBCC -lgcc && tryldflag LIBCC -lgcc_eh test -z "$LIBCC" && tryldflag LIBCC -lcompiler_rt +test -z "$LIBCC" && try_libcc=`$CC -print-libgcc-file-name 2>/dev/null` \ + && tryldflag LIBCC "$try_libcc" test -z "$LIBCC" && try_libcc=`$CC -print-file-name=libpcc.a 2>/dev/null` \ && tryldflag LIBCC "$try_libcc" printf "using compiler runtime libraries: %s\n" "$LIBCC" @@ -495,28 +576,94 @@ printf "using compiler runtime libraries: %s\n" "$LIBCC" SUBARCH= t="$CFLAGS_C99FSE $CPPFLAGS $CFLAGS" +if test "$ARCH" = "i386" ; then +printf "checking whether compiler can use ebx in PIC asm constraints... " +cat > "$tmpc" </dev/null 2>&1 ; then +printf "yes\n" +else +printf "no\n" +CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_EBX_ASM" +fi +fi + if test "$ARCH" = "x86_64" ; then trycppif __ILP32__ "$t" && ARCH=x32 fi if test "$ARCH" = "arm" ; then +if trycppif __thumb2__ "$t" ; then +tryflag CFLAGS_AUTO -mimplicit-it=always +tryflag CFLAGS_AUTO -Wa,-mimplicit-it=always +tryflag CFLAGS_AUTO -Wa,-mthumb +fi 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 "$ARCH" = "aarch64" ; then trycppif __AARCH64EB__ "$t" && SUBARCH=${SUBARCH}_be fi +if test "$ARCH" = "m68k" ; then +if trycppif "__HAVE_68881__" ; then : ; +elif trycppif "__mcffpu__" ; then SUBARCH="-fp64" +else SUBARCH="-sf" +fi +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" = "riscv64" ; then +trycppif __riscv_float_abi_soft "$t" && SUBARCH=${SUBARCH}-sf +trycppif __riscv_float_abi_single "$t" && SUBARCH=${SUBARCH}-sp +fi + if test "$ARCH" = "sh" ; then +tryflag CFLAGS_AUTO -Wa,--isa=any trycppif __BIG_ENDIAN__ "$t" && SUBARCH=${SUBARCH}eb if trycppif "__SH_FPU_ANY__ || __SH4__" "$t" ; then # Some sh configurations are broken and replace double with float @@ -533,6 +680,9 @@ fi else SUBARCH=${SUBARCH}-nofpu fi +if trycppif __SH_FDPIC__ "$t" ; then +SUBARCH=${SUBARCH}-fdpic +fi fi test "$SUBARCH" \ @@ -553,17 +703,27 @@ esac # printf "checking whether compiler's long double definition matches float.h... " echo '#include ' > "$tmpc" -echo '#if LDBL_MANT_DIG == 53' >> "$tmpc" -echo 'typedef char ldcheck[9-(int)sizeof(long double)];' >> "$tmpc" -echo '#endif' >> "$tmpc" -if $CC $CFLAGS_C99FSE -I./arch/$ARCH -I./include $CPPFLAGS $CFLAGS \ - -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then +echo '#define C(m,s) (m==LDBL_MANT_DIG && s==sizeof(long double))' >> "$tmpc" +echo 'typedef char ldcheck[(C(53,8)||C(64,12)||C(64,16)||C(113,16))*2-1];' >> "$tmpc" +if $CC $CFLAGS_C99FSE \ + -I$srcdir/arch/$ARCH -I$srcdir/arch/generic -I$srcdir/include \ + $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then printf "yes\n" else 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") @@ -576,9 +736,12 @@ cat << EOF # This version of config.mak was generated by: # $cmdline # Any changes made here will be lost if configure is re-run +AR = ${AR:-\$(CROSS_COMPILE)ar} +RANLIB = ${RANLIB:-\$(CROSS_COMPILE)ranlib} ARCH = $ARCH SUBARCH = $SUBARCH ASMSUBARCH = $ASMSUBARCH +srcdir = $srcdir prefix = $prefix exec_prefix = $exec_prefix bindir = $bindir @@ -586,21 +749,28 @@ libdir = $libdir includedir = $includedir syslibdir = $syslibdir CC = $CC -CFLAGS = $CFLAGS_AUTO $CFLAGS +CFLAGS = $CFLAGS +CFLAGS_AUTO = $CFLAGS_AUTO CFLAGS_C99FSE = $CFLAGS_C99FSE CFLAGS_MEMOPS = $CFLAGS_MEMOPS CFLAGS_NOSSP = $CFLAGS_NOSSP CPPFLAGS = $CPPFLAGS -LDFLAGS = $LDFLAGS_AUTO $LDFLAGS +LDFLAGS = $LDFLAGS +LDFLAGS_AUTO = $LDFLAGS_AUTO CROSS_COMPILE = $CROSS_COMPILE LIBCC = $LIBCC OPTIMIZE_GLOBS = $OPTIMIZE_GLOBS ALL_TOOLS = $tools TOOL_LIBS = $tool_libs +ADD_CFI = $ADD_CFI EOF test "x$static" = xno && echo "STATIC_LIBS =" test "x$shared" = xno && echo "SHARED_LIBS =" test "x$cc_family" = xgcc && echo 'WRAPCC_GCC = $(CC)' +test "x$cc_family" = xclang && echo 'WRAPCC_CLANG = $(CC)' +test "x$pic_default" = xyes && echo 'AOBJS = $(LOBJS)' exec 1>&3 3>&- +test "$srcdir" = "." || ln -sf $srcdir/Makefile . + printf "done\n"