+++ /dev/null
-# lib-prefix.m4 serial 17
-dnl Copyright (C) 2001-2005, 2008-2019 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl From Bruno Haible.
-
-dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
-dnl to access previously installed libraries. The basic assumption is that
-dnl a user will want packages to use other packages he previously installed
-dnl with the same --prefix option.
-dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
-dnl libraries, but is otherwise very convenient.
-AC_DEFUN([AC_LIB_PREFIX],
-[
- AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
- AC_REQUIRE([AC_PROG_CC])
- AC_REQUIRE([AC_CANONICAL_HOST])
- AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
- AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
- dnl By default, look in $includedir and $libdir.
- use_additional=yes
- AC_LIB_WITH_FINAL_PREFIX([
- eval additional_includedir=\"$includedir\"
- eval additional_libdir=\"$libdir\"
- ])
- AC_ARG_WITH([lib-prefix],
-[[ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
- --without-lib-prefix don't search for libraries in includedir and libdir]],
-[
- if test "X$withval" = "Xno"; then
- use_additional=no
- else
- if test "X$withval" = "X"; then
- AC_LIB_WITH_FINAL_PREFIX([
- eval additional_includedir=\"$includedir\"
- eval additional_libdir=\"$libdir\"
- ])
- else
- additional_includedir="$withval/include"
- additional_libdir="$withval/$acl_libdirstem"
- fi
- fi
-])
- if test $use_additional = yes; then
- dnl Potentially add $additional_includedir to $CPPFLAGS.
- dnl But don't add it
- dnl 1. if it's the standard /usr/include,
- dnl 2. if it's already present in $CPPFLAGS,
- dnl 3. if it's /usr/local/include and we are using GCC on Linux,
- dnl 4. if it doesn't exist as a directory.
- if test "X$additional_includedir" != "X/usr/include"; then
- haveit=
- for x in $CPPFLAGS; do
- AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
- if test "X$x" = "X-I$additional_includedir"; then
- haveit=yes
- break
- fi
- done
- if test -z "$haveit"; then
- if test "X$additional_includedir" = "X/usr/local/include"; then
- if test -n "$GCC"; then
- case $host_os in
- linux* | gnu* | k*bsd*-gnu) haveit=yes;;
- esac
- fi
- fi
- if test -z "$haveit"; then
- if test -d "$additional_includedir"; then
- dnl Really add $additional_includedir to $CPPFLAGS.
- CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
- fi
- fi
- fi
- fi
- dnl Potentially add $additional_libdir to $LDFLAGS.
- dnl But don't add it
- dnl 1. if it's the standard /usr/lib,
- dnl 2. if it's already present in $LDFLAGS,
- dnl 3. if it's /usr/local/lib and we are using GCC on Linux,
- dnl 4. if it doesn't exist as a directory.
- if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
- haveit=
- for x in $LDFLAGS; do
- AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
- if test "X$x" = "X-L$additional_libdir"; then
- haveit=yes
- break
- fi
- done
- if test -z "$haveit"; then
- if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
- if test -n "$GCC"; then
- case $host_os in
- linux*) haveit=yes;;
- esac
- fi
- fi
- if test -z "$haveit"; then
- if test -d "$additional_libdir"; then
- dnl Really add $additional_libdir to $LDFLAGS.
- LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
- fi
- fi
- fi
- fi
- fi
-])
-
-dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
-dnl acl_final_exec_prefix, containing the values to which $prefix and
-dnl $exec_prefix will expand at the end of the configure script.
-AC_DEFUN([AC_LIB_PREPARE_PREFIX],
-[
- dnl Unfortunately, prefix and exec_prefix get only finally determined
- dnl at the end of configure.
- if test "X$prefix" = "XNONE"; then
- acl_final_prefix="$ac_default_prefix"
- else
- acl_final_prefix="$prefix"
- fi
- if test "X$exec_prefix" = "XNONE"; then
- acl_final_exec_prefix='${prefix}'
- else
- acl_final_exec_prefix="$exec_prefix"
- fi
- acl_save_prefix="$prefix"
- prefix="$acl_final_prefix"
- eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
- prefix="$acl_save_prefix"
-])
-
-dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
-dnl variables prefix and exec_prefix bound to the values they will have
-dnl at the end of the configure script.
-AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
-[
- acl_save_prefix="$prefix"
- prefix="$acl_final_prefix"
- acl_save_exec_prefix="$exec_prefix"
- exec_prefix="$acl_final_exec_prefix"
- $1
- exec_prefix="$acl_save_exec_prefix"
- prefix="$acl_save_prefix"
-])
-
-dnl AC_LIB_PREPARE_MULTILIB creates
-dnl - a function acl_is_expected_elfclass, that tests whether standard input
-dn; has a 32-bit or 64-bit ELF header, depending on the host CPU ABI,
-dnl - 3 variables acl_libdirstem, acl_libdirstem2, acl_libdirstem3, containing
-dnl the basename of the libdir to try in turn, either "lib" or "lib64" or
-dnl "lib/64" or "lib32" or "lib/sparcv9" or "lib/amd64" or similar.
-AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
-[
- dnl There is no formal standard regarding lib, lib32, and lib64.
- dnl On most glibc systems, the current practice is that on a system supporting
- dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
- dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. However, on
- dnl Arch Linux based distributions, it's the opposite: 32-bit libraries go
- dnl under $prefix/lib32 and 64-bit libraries go under $prefix/lib.
- dnl We determine the compiler's default mode by looking at the compiler's
- dnl library search path. If at least one of its elements ends in /lib64 or
- dnl points to a directory whose absolute pathname ends in /lib64, we use that
- dnl for 64-bit ABIs. Similarly for 32-bit ABIs. Otherwise we use the default,
- dnl namely "lib".
- dnl On Solaris systems, the current practice is that on a system supporting
- dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
- dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
- dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
- AC_REQUIRE([AC_CANONICAL_HOST])
- AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
-
- AC_CACHE_CHECK([for ELF binary format], [gl_cv_elf],
- [AC_EGREP_CPP([Extensible Linking Format],
- [#ifdef __ELF__
- Extensible Linking Format
- #endif
- ],
- [gl_cv_elf=yes],
- [gl_cv_elf=no])
- ])
- if test $gl_cv_elf; then
- # Extract the ELF class of a file (5th byte) in decimal.
- # Cf. https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
- if od -A x < /dev/null >/dev/null 2>/dev/null; then
- # Use POSIX od.
- func_elfclass ()
- {
- od -A n -t d1 -j 4 -N 1
- }
- else
- # Use BSD hexdump.
- func_elfclass ()
- {
- dd bs=1 count=1 skip=4 2>/dev/null | hexdump -e '1/1 "%3d "'
- echo
- }
- fi
-changequote(,)dnl
- case $HOST_CPU_C_ABI_32BIT in
- yes)
- # 32-bit ABI.
- acl_is_expected_elfclass ()
- {
- test "`func_elfclass | sed -e 's/[ ]//g'`" = 1
- }
- ;;
- no)
- # 64-bit ABI.
- acl_is_expected_elfclass ()
- {
- test "`func_elfclass | sed -e 's/[ ]//g'`" = 2
- }
- ;;
- *)
- # Unknown.
- acl_is_expected_elfclass ()
- {
- :
- }
- ;;
- esac
-changequote([,])dnl
- else
- acl_is_expected_elfclass ()
- {
- :
- }
- fi
-
- dnl Allow the user to override the result by setting acl_cv_libdirstems.
- AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
- [acl_cv_libdirstems],
- [dnl Try 'lib' first, because that's the default for libdir in GNU, see
- dnl <https://www.gnu.org/prep/standards/html_node/Directory-Variables.html>.
- acl_libdirstem=lib
- acl_libdirstem2=
- acl_libdirstem3=
- case "$host_os" in
- solaris*)
- dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
- dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.
- dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
- dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
- dnl symlink is missing, so we set acl_libdirstem2 too.
- if test $HOST_CPU_C_ABI_32BIT = no; then
- acl_libdirstem2=lib/64
- case "$host_cpu" in
- sparc*) acl_libdirstem3=lib/sparcv9 ;;
- i*86 | x86_64) acl_libdirstem3=lib/amd64 ;;
- esac
- fi
- ;;
- *)
- dnl If $CC generates code for a 32-bit ABI, the libraries are
- dnl surely under $prefix/lib or $prefix/lib32, not $prefix/lib64.
- dnl Similarly, if $CC generates code for a 64-bit ABI, the libraries
- dnl are surely under $prefix/lib or $prefix/lib64, not $prefix/lib32.
- dnl Find the compiler's search path. However, non-system compilers
- dnl sometimes have odd library search paths. But we can't simply invoke
- dnl '/usr/bin/gcc -print-search-dirs' because that would not take into
- dnl account the -m32/-m31 or -m64 options from the $CC or $CFLAGS.
- searchpath=`(LC_ALL=C $CC $CPPFLAGS $CFLAGS -print-search-dirs) 2>/dev/null \
- | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
- if test $HOST_CPU_C_ABI_32BIT != no; then
- # 32-bit or unknown ABI.
- if test -d /usr/lib32; then
- acl_libdirstem2=lib32
- fi
- fi
- if test $HOST_CPU_C_ABI_32BIT != yes; then
- # 64-bit or unknown ABI.
- if test -d /usr/lib64; then
- acl_libdirstem3=lib64
- fi
- fi
- if test -n "$searchpath"; then
- acl_save_IFS="${IFS= }"; IFS=":"
- for searchdir in $searchpath; do
- if test -d "$searchdir"; then
- case "$searchdir" in
- */lib32/ | */lib32 ) acl_libdirstem2=lib32 ;;
- */lib64/ | */lib64 ) acl_libdirstem3=lib64 ;;
- */../ | */.. )
- # Better ignore directories of this form. They are misleading.
- ;;
- *) searchdir=`cd "$searchdir" && pwd`
- case "$searchdir" in
- */lib32 ) acl_libdirstem2=lib32 ;;
- */lib64 ) acl_libdirstem3=lib64 ;;
- esac ;;
- esac
- fi
- done
- IFS="$acl_save_IFS"
- if test $HOST_CPU_C_ABI_32BIT = yes; then
- # 32-bit ABI.
- acl_libdirstem3=
- fi
- if test $HOST_CPU_C_ABI_32BIT = no; then
- # 64-bit ABI.
- acl_libdirstem2=
- fi
- fi
- ;;
- esac
- test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
- test -n "$acl_libdirstem3" || acl_libdirstem3="$acl_libdirstem"
- acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2,$acl_libdirstem3"
- ])
- dnl Decompose acl_cv_libdirstems into acl_libdirstem, acl_libdirstem2, and
- dnl acl_libdirstem3.
-changequote(,)dnl
- acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
- acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,//' -e 's/,.*//'`
- acl_libdirstem3=`echo "$acl_cv_libdirstems" | sed -e 's/^[^,]*,[^,]*,//' -e 's/,.*//'`
-changequote([,])dnl
-])
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