250 lines
9.5 KiB
Text
250 lines
9.5 KiB
Text
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# lib-prefix.m4 serial 14
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dnl Copyright (C) 2001-2005, 2008-2019 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Bruno Haible.
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dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
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dnl to access previously installed libraries. The basic assumption is that
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dnl a user will want packages to use other packages he previously installed
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dnl with the same --prefix option.
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dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
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dnl libraries, but is otherwise very convenient.
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AC_DEFUN([AC_LIB_PREFIX],
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[
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AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
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AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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dnl By default, look in $includedir and $libdir.
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use_additional=yes
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AC_LIB_WITH_FINAL_PREFIX([
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eval additional_includedir=\"$includedir\"
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eval additional_libdir=\"$libdir\"
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])
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AC_ARG_WITH([lib-prefix],
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[[ --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
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--without-lib-prefix don't search for libraries in includedir and libdir]],
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[
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if test "X$withval" = "Xno"; then
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use_additional=no
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else
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if test "X$withval" = "X"; then
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AC_LIB_WITH_FINAL_PREFIX([
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eval additional_includedir=\"$includedir\"
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eval additional_libdir=\"$libdir\"
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])
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else
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additional_includedir="$withval/include"
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additional_libdir="$withval/$acl_libdirstem"
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fi
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fi
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])
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if test $use_additional = yes; then
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dnl Potentially add $additional_includedir to $CPPFLAGS.
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dnl But don't add it
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dnl 1. if it's the standard /usr/include,
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dnl 2. if it's already present in $CPPFLAGS,
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dnl 3. if it's /usr/local/include and we are using GCC on Linux,
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dnl 4. if it doesn't exist as a directory.
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if test "X$additional_includedir" != "X/usr/include"; then
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haveit=
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for x in $CPPFLAGS; do
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AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
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if test "X$x" = "X-I$additional_includedir"; then
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haveit=yes
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break
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fi
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done
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if test -z "$haveit"; then
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if test "X$additional_includedir" = "X/usr/local/include"; then
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if test -n "$GCC"; then
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case $host_os in
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linux* | gnu* | k*bsd*-gnu) haveit=yes;;
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esac
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fi
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fi
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if test -z "$haveit"; then
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if test -d "$additional_includedir"; then
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dnl Really add $additional_includedir to $CPPFLAGS.
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CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
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fi
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fi
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fi
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fi
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dnl Potentially add $additional_libdir to $LDFLAGS.
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dnl But don't add it
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dnl 1. if it's the standard /usr/lib,
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dnl 2. if it's already present in $LDFLAGS,
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dnl 3. if it's /usr/local/lib and we are using GCC on Linux,
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dnl 4. if it doesn't exist as a directory.
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if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
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haveit=
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for x in $LDFLAGS; do
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AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
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if test "X$x" = "X-L$additional_libdir"; then
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haveit=yes
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break
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fi
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done
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if test -z "$haveit"; then
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if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
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if test -n "$GCC"; then
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case $host_os in
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linux*) haveit=yes;;
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esac
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fi
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fi
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if test -z "$haveit"; then
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if test -d "$additional_libdir"; then
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dnl Really add $additional_libdir to $LDFLAGS.
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LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
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fi
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fi
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fi
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fi
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fi
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])
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dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
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dnl acl_final_exec_prefix, containing the values to which $prefix and
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dnl $exec_prefix will expand at the end of the configure script.
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AC_DEFUN([AC_LIB_PREPARE_PREFIX],
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[
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dnl Unfortunately, prefix and exec_prefix get only finally determined
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dnl at the end of configure.
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if test "X$prefix" = "XNONE"; then
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acl_final_prefix="$ac_default_prefix"
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else
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acl_final_prefix="$prefix"
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fi
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if test "X$exec_prefix" = "XNONE"; then
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acl_final_exec_prefix='${prefix}'
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else
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acl_final_exec_prefix="$exec_prefix"
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fi
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acl_save_prefix="$prefix"
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prefix="$acl_final_prefix"
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eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
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prefix="$acl_save_prefix"
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])
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dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
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dnl variables prefix and exec_prefix bound to the values they will have
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dnl at the end of the configure script.
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AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
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[
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acl_save_prefix="$prefix"
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prefix="$acl_final_prefix"
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acl_save_exec_prefix="$exec_prefix"
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exec_prefix="$acl_final_exec_prefix"
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$1
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exec_prefix="$acl_save_exec_prefix"
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prefix="$acl_save_prefix"
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])
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dnl AC_LIB_PREPARE_MULTILIB creates
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dnl - a variable acl_libdirstem, containing the basename of the libdir, either
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dnl "lib" or "lib64" or "lib/64",
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dnl - a variable acl_libdirstem2, as a secondary possible value for
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dnl acl_libdirstem, either the same as acl_libdirstem or "lib/sparcv9" or
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dnl "lib/amd64".
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AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
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[
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dnl There is no formal standard regarding lib and lib64.
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dnl On glibc systems, the current practice is that on a system supporting
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dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
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dnl $prefix/lib64 and 32-bit libraries go under $prefix/lib. We determine
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dnl the compiler's default mode by looking at the compiler's library search
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dnl path. If at least one of its elements ends in /lib64 or points to a
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dnl directory whose absolute pathname ends in /lib64, we assume a 64-bit ABI.
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dnl Otherwise we use the default, namely "lib".
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dnl On Solaris systems, the current practice is that on a system supporting
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dnl 32-bit and 64-bit instruction sets or ABIs, 64-bit libraries go under
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dnl $prefix/lib/64 (which is a symlink to either $prefix/lib/sparcv9 or
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dnl $prefix/lib/amd64) and 32-bit libraries go under $prefix/lib.
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_REQUIRE([gl_HOST_CPU_C_ABI_32BIT])
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case "$host_os" in
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solaris*)
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AC_CACHE_CHECK([for 64-bit host], [gl_cv_solaris_64bit],
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[AC_COMPILE_IFELSE(
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[AC_LANG_SOURCE(
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[[#ifdef _LP64
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int ok;
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#else
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error fail
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#endif
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]])],
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[gl_cv_solaris_64bit=yes],
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[gl_cv_solaris_64bit=no])
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]);;
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esac
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dnl Allow the user to override the result by setting acl_cv_libdirstems.
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AC_CACHE_CHECK([for the common suffixes of directories in the library search path],
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[acl_cv_libdirstems],
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[acl_libdirstem=lib
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acl_libdirstem2=
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case "$host_os" in
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solaris*)
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dnl See Solaris 10 Software Developer Collection > Solaris 64-bit Developer's Guide > The Development Environment
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dnl <https://docs.oracle.com/cd/E19253-01/816-5138/dev-env/index.html>.
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dnl "Portable Makefiles should refer to any library directories using the 64 symbolic link."
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dnl But we want to recognize the sparcv9 or amd64 subdirectory also if the
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dnl symlink is missing, so we set acl_libdirstem2 too.
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if test $gl_cv_solaris_64bit = yes; then
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acl_libdirstem=lib/64
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case "$host_cpu" in
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sparc*) acl_libdirstem2=lib/sparcv9 ;;
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i*86 | x86_64) acl_libdirstem2=lib/amd64 ;;
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esac
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fi
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;;
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*)
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dnl If $CC generates code for a 32-bit ABI, the libraries are
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dnl surely under $prefix/lib, not $prefix/lib64.
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if test "$HOST_CPU_C_ABI_32BIT" != yes; then
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dnl The result is a property of the system. However, non-system
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dnl compilers sometimes have odd library search paths. Therefore
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dnl prefer asking /usr/bin/gcc, if available, rather than $CC.
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searchpath=`(if test -f /usr/bin/gcc \
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&& LC_ALL=C /usr/bin/gcc -print-search-dirs >/dev/null 2>/dev/null; then \
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LC_ALL=C /usr/bin/gcc -print-search-dirs; \
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else \
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LC_ALL=C $CC -print-search-dirs; \
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fi) 2>/dev/null \
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| sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
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if test -n "$searchpath"; then
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acl_save_IFS="${IFS= }"; IFS=":"
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for searchdir in $searchpath; do
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if test -d "$searchdir"; then
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case "$searchdir" in
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*/lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
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*/../ | */.. )
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# Better ignore directories of this form. They are misleading.
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;;
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*) searchdir=`cd "$searchdir" && pwd`
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case "$searchdir" in
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*/lib64 ) acl_libdirstem=lib64 ;;
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esac ;;
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esac
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fi
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done
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IFS="$acl_save_IFS"
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fi
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fi
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;;
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esac
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test -n "$acl_libdirstem2" || acl_libdirstem2="$acl_libdirstem"
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acl_cv_libdirstems="$acl_libdirstem,$acl_libdirstem2"
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])
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# Decompose acl_cv_libdirstems into acl_libdirstem and acl_libdirstem2.
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acl_libdirstem=`echo "$acl_cv_libdirstems" | sed -e 's/,.*//'`
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acl_libdirstem2=`echo "$acl_cv_libdirstems" | sed -e '/,/s/.*,//'`
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])
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