313 lines
9.8 KiB
Plaintext
313 lines
9.8 KiB
Plaintext
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dnl We require that everyone use exactly the same Autoconf version so that
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dnl the internal functions defined and used by the main configure script
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dnl match those expected by the fragments. When changing this version,
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dnl install.texi also needs to be updated.
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m4_define([GLIBC_AUTOCONF_VERSION], [2.69])
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m4_if(m4_defn([AC_AUTOCONF_VERSION]), GLIBC_AUTOCONF_VERSION, [],
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[m4_fatal(m4_flatten(
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Exactly version GLIBC_AUTOCONF_VERSION of Autoconf is required but you have
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m4_defn([AC_AUTOCONF_VERSION])
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), [63])])dnl
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dnl
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dnl We define the macro GLIBC_PROVIDES to do an AC_PROVIDE for each macro
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dnl which appears in configure.ac before the sysdep configure scripts are run.
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dnl Each sysdep configure.ac does GLIBC_PROVIDES first, to avoid any
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dnl AC_REQUIREs or AC_BEFOREs duplicating their code.
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dnl
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define([GLIBC_PROVIDES], [dnl
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AC_PROVIDE([AC_CONFIG_AUX_DIR_DEFAULT])dnl
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AC_PROVIDE([AC_CONFIG_SUBDIRS])dnl
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AC_PROVIDE([_AS_ECHO_N_PREPARE])dnl
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AC_PROVIDE([_AS_ECHO_PREPARE])dnl
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AC_PROVIDE([_AS_CR_PREPARE])dnl
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AC_PROVIDE([_AS_TR_SH_PREPARE])dnl
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AC_PROVIDE([_AS_VAR_ARITH_PREPARE])dnl
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AC_PROVIDE([AC_PROG_INSTALL])dnl
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AC_PROVIDE([AC_PROG_CC])dnl
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AC_PROVIDE([AC_PROG_CPP])dnl
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AC_PROVIDE([_AS_PATH_SEPARATOR_PREPARE])dnl
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AC_PROVIDE([_AS_TEST_PREPARE])dnl
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AC_PROVIDE([_AS_BASENAME_PREPARE])dnl
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AC_PROVIDE([_AS_ME_PREPARE])dnl
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AC_PROVIDE([_AS_LINENO_PREPARE])dnl
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AC_PROVIDE([AS_SHELL_FN_as_fn_set_status])dnl
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AC_PROVIDE([AS_SHELL_FN_as_fn_exit])dnl
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AC_PROVIDE([AS_SHELL_FN_as_fn_arith])dnl
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AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_compile])dnl
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AC_PROVIDE([AS_SHELL_FN_ac_fn_c_try_cpp])dnl
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define([AS_MESSAGE_LOG_FD],5)dnl
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define([AS_MESSAGE_FD],6)dnl
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dnl Ripped out of AS_INIT, which does more cruft we do not want.
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m4_wrap([m4_divert_pop([BODY])[]])
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m4_divert_push([BODY])[]dnl
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dnl End of ripped out of AS_INIT.
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# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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define([_AC_LANG], [C])dnl
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])dnl
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dnl
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dnl Check for a symbol
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dnl
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AC_DEFUN([AC_CHECK_SYMBOL], [dnl
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AC_MSG_CHECKING(for $1)
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AC_CACHE_VAL(ac_cv_check_symbol_$1, [dnl
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AC_TRY_LINK(,
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changequote(,)dnl
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extern char *$1[]; puts(*$1);,
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changequote([,])dnl
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ac_cv_check_symbol_$1=yes, ac_cv_check_symbol_$1=no)])
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if test "$ac_cv_check_symbol_$1" = yes; then
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changequote(,)dnl
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ac_tr_symbol=`echo $1 | tr '[a-z]' '[A-Z]'`
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changequote([,])dnl
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AC_DEFINE_UNQUOTED(HAVE_${ac_tr_symbol})
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fi
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AC_MSG_RESULT($ac_cv_check_symbol_$1)])dnl
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dnl
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dnl Locate a program and check that its version is acceptable.
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dnl AC_PROG_CHECK_VER(var, namelist, version-switch,
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dnl [version-extract-regexp], version-glob [, do-if-fail])
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AC_DEFUN([AC_CHECK_PROG_VER],
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[AC_CHECK_PROGS([$1], [$2])
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if test -z "[$]$1"; then
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ac_verc_fail=yes
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else
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# Found it, now check the version.
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AC_MSG_CHECKING([version of [$]$1])
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changequote(<<,>>)dnl
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ac_prog_version=`<<$>>$1 $3 2>&1 ifelse(<<$4>>,,,
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<<| sed -n 's/^.*patsubst(<<$4>>,/,\/).*$/\1/p'>>)`
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case $ac_prog_version in
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'') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
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<<$5>>)
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changequote([,])dnl
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ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
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*) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
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esac
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AC_MSG_RESULT([$ac_prog_version])
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fi
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ifelse([$6],,,
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[if test $ac_verc_fail = yes; then
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$6
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fi])
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])
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dnl These modifications are to allow for an empty cross compiler tree.
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define([_AC_COMPILER_EXEEXT], [EXEEXT=
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])
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AC_DEFUN([LIBC_PROG_FOO_GNU],
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[# Most GNU programs take a -v and spit out some text including
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# the word 'GNU'. Some try to read stdin, so give them /dev/null.
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if $1 -o conftest -v </dev/null 2>&1 | grep GNU > /dev/null 2>&1; then
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$2
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else
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$3
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fi
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rm -fr contest*])
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AC_DEFUN([LIBC_PROG_BINUTILS],
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[# Was a --with-binutils option given?
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if test -n "$path_binutils"; then
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# Make absolute; ensure a single trailing slash.
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path_binutils=`(cd $path_binutils; pwd) | sed 's%/*$%/%'`
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CC="$CC -B$path_binutils"
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fi
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case "$CC" in
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*fuse-ld=lld*) LDNAME=ld.lld;;
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*) LDNAME=ld;;
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esac
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AS=`$CC -print-prog-name=as`
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LD=`$CC -print-prog-name=$LDNAME`
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AR=`$CC -print-prog-name=ar`
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AC_SUBST(AR)
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OBJDUMP=`$CC -print-prog-name=objdump`
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AC_SUBST(OBJDUMP)
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OBJCOPY=`$CC -print-prog-name=objcopy`
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AC_SUBST(OBJCOPY)
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GPROF=`$CC -print-prog-name=gprof`
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AC_SUBST(GPROF)
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# Determine whether we are using GNU binutils.
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AC_CACHE_CHECK(whether $AS is GNU as, libc_cv_prog_as_gnu,
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[LIBC_PROG_FOO_GNU($AS, libc_cv_prog_as_gnu=yes, libc_cv_prog_as_gnu=no)])
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rm -f a.out
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gnu_as=$libc_cv_prog_as_gnu
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AC_CACHE_CHECK(whether $LD is GNU ld, libc_cv_prog_ld_gnu,
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[LIBC_PROG_FOO_GNU($LD, libc_cv_prog_ld_gnu=yes, libc_cv_prog_ld_gnu=no)])
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gnu_ld=$libc_cv_prog_ld_gnu
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])
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dnl Run a static link test with -nostdlib -nostartfiles.
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dnl LIBC_TRY_LINK_STATIC([code], [action-if-true], [action-if-false])
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AC_DEFUN([LIBC_TRY_LINK_STATIC],
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[cat > conftest.c <<EOF
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int _start (void) { return 0; }
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int __start (void) { return 0; }
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$1
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EOF
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AS_IF([AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
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conftest.c -static -nostartfiles -nostdlib
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1>&AS_MESSAGE_LOG_FD])],
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[$2], [$3])
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rm -f conftest*])
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dnl Test a compiler option or options with an empty input file.
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dnl LIBC_TRY_CC_OPTION([options], [action-if-true], [action-if-false])
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AC_DEFUN([LIBC_TRY_CC_OPTION],
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[AS_IF([AC_TRY_COMMAND([${CC-cc} $1 -xc /dev/null -S -o /dev/null])],
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[$2], [$3])])
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dnl Find and source sysdeps/*/preconfigure.
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dnl LIBC_PRECONFIGURE([$srcdir], [for])
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AC_DEFUN([LIBC_PRECONFIGURE], [dnl
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if frags=`ls -d $1/sysdeps/*/preconfigure 2> /dev/null`
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then
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AC_MSG_CHECKING($2 preconfigure fragments)
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for frag in $frags; do
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name=`echo "$frag" | sed 's@/[[^/]]*[$]@@;s@^.*/@@'`
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echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD
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. "$frag"
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done
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AC_MSG_RESULT()
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fi])
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# These two macros are taken from GCC's config/acx.m4.
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dnl Support the --with-pkgversion configure option.
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dnl ACX_PKGVERSION(default-pkgversion)
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AC_DEFUN([ACX_PKGVERSION],[
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AC_ARG_WITH(pkgversion,
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AS_HELP_STRING([--with-pkgversion=PKG],
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[Use PKG in the version string in place of "$1"]),
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[case "$withval" in
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yes) AC_MSG_ERROR([package version not specified]) ;;
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no) PKGVERSION= ;;
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*) PKGVERSION="($withval) " ;;
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esac],
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PKGVERSION="($1) "
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)
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PKGVERSION_TEXI=`echo "$PKGVERSION" | sed 's/@/@@/g'`
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AC_SUBST(PKGVERSION)
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AC_SUBST(PKGVERSION_TEXI)
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])
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dnl Support the --with-bugurl configure option.
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dnl ACX_BUGURL(default-bugurl)
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AC_DEFUN([ACX_BUGURL],[
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AC_ARG_WITH(bugurl,
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AS_HELP_STRING([--with-bugurl=URL],
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[Direct users to URL to report a bug]),
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[case "$withval" in
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yes) AC_MSG_ERROR([bug URL not specified]) ;;
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no) BUGURL=
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;;
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*) BUGURL="$withval"
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;;
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esac],
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BUGURL="$1"
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)
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case ${BUGURL} in
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"")
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REPORT_BUGS_TO=
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REPORT_BUGS_TEXI=
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;;
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*)
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REPORT_BUGS_TO="<$BUGURL>"
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REPORT_BUGS_TEXI=@uref{`echo "$BUGURL" | sed 's/@/@@/g'`}
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;;
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esac;
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AC_SUBST(REPORT_BUGS_TO)
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AC_SUBST(REPORT_BUGS_TEXI)
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])
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dnl Check linker option support.
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dnl LIBC_LINKER_FEATURE([ld_option], [cc_option], [action-if-true], [action-if-false])
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AC_DEFUN([LIBC_LINKER_FEATURE],
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[AC_MSG_CHECKING([for linker that supports $1])
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libc_linker_feature=no
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if test x"$gnu_ld" = x"yes"; then
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cat > conftest.c <<EOF
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int _start (void) { return 42; }
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EOF
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
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$2 -nostdlib -nostartfiles
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-fPIC -shared -o conftest.so conftest.c
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1>&AS_MESSAGE_LOG_FD])
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then
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if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp $2 -nostdlib \
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-nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
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| grep "warning: $1 ignored" > /dev/null 2>&1; then
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true
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else
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libc_linker_feature=yes
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fi
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fi
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rm -f conftest*
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fi
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if test $libc_linker_feature = yes; then
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$3
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else
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$4
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fi
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AC_MSG_RESULT($libc_linker_feature)])
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dnl Add a makefile variable, with value set from a shell string
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dnl (expanded by the shell inside double quotes), to config.make.
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dnl LIBC_CONFIG_VAR(make-variable, shell-value)
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AC_DEFUN([LIBC_CONFIG_VAR],
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[config_vars="$config_vars
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$1 = $2"])
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dnl Check that function FUNC was inlined as a builtin. The code fragment
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dnl CODE is compiled with additional options CC_OPTION. If FUNC is
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dnl not found in the assembly then it is assumed the compiler has support
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dnl for this builtin and has inlined the call. If the compiler has the
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dnl feature then ACTION-IF-TRUE is called, otherwise ACTION-IF-FALSE.
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dnl It is up to the caller to provide a CC_OPTION that ensures the
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dnl builtin is inlined if present.
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dnl Warning: This may not work for some machines. For example on ARM the
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dnl ABI dictates that some functions should not be inlined and instead
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dnl should be provided by a compiler helper library e.g. __aeabi_memcpy.
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dnl This is done to reduce code size.
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dnl LIBC_COMPILER_BUILTIN([func], [code], [cc_option], [action-if-true], [action-if-false])
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AC_DEFUN([LIBC_COMPILER_BUILTIN_INLINED],
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[AC_MSG_CHECKING([for compiler support of inlined builtin function $1])
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libc_compiler_builtin_inlined=no
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cat > conftest.c <<EOF
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int _start (void) { $2 return 0; }
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EOF
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if ! AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
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$3 -nostdlib -nostartfiles
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-S conftest.c -o - | grep -F "$1"
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1>&AS_MESSAGE_LOG_FD])
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then
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libc_compiler_builtin_inlined=yes
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fi
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rm -f conftest*
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if test $libc_compiler_builtin_inlined = yes; then
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$4
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else
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$5
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fi
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AC_MSG_RESULT($libc_compiler_builtin_inlined)])
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dnl Default to slibdir named SLIBDIR instead of "lib", and rtlddir
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dnl named RTLDDIR instead of "lib". This is used to put 64-bit
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dnl libraries in /lib64.
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dnl LIBC_SLIBDIR_RTLDDIR([slibdir], [rtlddir])
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AC_DEFUN([LIBC_SLIBDIR_RTLDDIR],
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[test -n "$libc_cv_slibdir" ||
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case "$prefix" in
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/usr | /usr/)
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libc_cv_slibdir='/$1'
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libc_cv_rtlddir='/$2'
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if test "$libdir" = '${exec_prefix}/lib'; then
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libdir='${exec_prefix}/$1';
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# Locale data can be shared between 32-bit and 64-bit libraries.
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libc_cv_complocaledir='${exec_prefix}/lib/locale'
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fi
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;;
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esac])
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