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Annotation of embedaddon/libiconv/srcm4/relocatable.m4, revision 1.1.1.2

1.1.1.2 ! misho       1: # relocatable.m4 serial 17
        !             2: dnl Copyright (C) 2003, 2005-2007, 2009-2011 Free Software Foundation, Inc.
1.1       misho       3: dnl This file is free software; the Free Software Foundation
                      4: dnl gives unlimited permission to copy and/or distribute it,
                      5: dnl with or without modifications, as long as this notice is preserved.
                      6: 
                      7: dnl From Bruno Haible.
                      8: 
                      9: dnl gl_RELOCATABLE([RELOCWRAPPER-DIR])
                     10: dnl ----------------------------------------------------------
                     11: dnl Support for relocatable programs.
                     12: dnl Supply RELOCWRAPPER-DIR as the directory where relocwrapper.c may be found.
                     13: AC_DEFUN([gl_RELOCATABLE],
                     14: [
                     15:   AC_REQUIRE([gl_RELOCATABLE_BODY])
                     16:   gl_RELOCATABLE_LIBRARY
                     17:   : ${RELOCATABLE_CONFIG_H_DIR='$(top_builddir)'}
                     18:   RELOCATABLE_SRC_DIR="\$(top_srcdir)/$gl_source_base"
                     19:   RELOCATABLE_BUILD_DIR="\$(top_builddir)/$gl_source_base"
                     20: ])
                     21: dnl The guts of gl_RELOCATABLE. Needs to be expanded only once.
                     22: AC_DEFUN([gl_RELOCATABLE_BODY],
                     23: [
                     24:   AC_REQUIRE([AC_PROG_INSTALL])
                     25:   dnl This AC_BEFORE invocation leads to unjustified autoconf warnings
                     26:   dnl when gl_RELOCATABLE_BODY is invoked more than once.
                     27:   dnl We need this AC_BEFORE because AC_PROG_INSTALL is documented to
                     28:   dnl overwrite earlier settings of INSTALL and INSTALL_PROGRAM (even
                     29:   dnl though in autoconf-2.52..2.60 it doesn't do so), but we want this
                     30:   dnl macro's setting of INSTALL_PROGRAM to persist.
                     31:   AC_BEFORE([AC_PROG_INSTALL],[gl_RELOCATABLE_BODY])
                     32:   AC_REQUIRE([AC_LIB_LIBPATH])
                     33:   AC_REQUIRE([gl_RELOCATABLE_LIBRARY_BODY])
                     34:   is_noop=no
                     35:   use_elf_origin_trick=no
1.1.1.2 ! misho      36:   use_wrapper=no
1.1       misho      37:   if test $RELOCATABLE = yes; then
                     38:     # --enable-relocatable implies --disable-rpath
                     39:     enable_rpath=no
                     40:     AC_CHECK_HEADERS([mach-o/dyld.h])
                     41:     AC_CHECK_FUNCS([_NSGetExecutablePath])
                     42:     case "$host_os" in
                     43:       mingw*) is_noop=yes ;;
                     44:       linux*) use_elf_origin_trick=yes ;;
                     45:     esac
                     46:     if test $is_noop = yes; then
                     47:       RELOCATABLE_LDFLAGS=:
                     48:       AC_SUBST([RELOCATABLE_LDFLAGS])
                     49:     else
                     50:       if test $use_elf_origin_trick = yes; then
                     51:         dnl Use the dynamic linker's support for relocatable programs.
                     52:         case "$ac_aux_dir" in
                     53:           /*) reloc_ldflags="$ac_aux_dir/reloc-ldflags" ;;
                     54:           *) reloc_ldflags="\$(top_builddir)/$ac_aux_dir/reloc-ldflags" ;;
                     55:         esac
                     56:         RELOCATABLE_LDFLAGS="\"$reloc_ldflags\" \"\$(host)\" \"\$(RELOCATABLE_LIBRARY_PATH)\""
                     57:         AC_SUBST([RELOCATABLE_LDFLAGS])
                     58:       else
1.1.1.2 ! misho      59:         use_wrapper=yes
1.1       misho      60:         dnl Unfortunately we cannot define INSTALL_PROGRAM to a command
                     61:         dnl consisting of more than one word - libtool doesn't support this.
                     62:         dnl So we abuse the INSTALL_PROGRAM_ENV hook, originally meant for the
                     63:         dnl 'install-strip' target.
                     64:         INSTALL_PROGRAM_ENV="RELOC_LIBRARY_PATH_VAR=\"$shlibpath_var\" RELOC_LIBRARY_PATH_VALUE=\"\$(RELOCATABLE_LIBRARY_PATH)\" RELOC_PREFIX=\"\$(prefix)\" RELOC_DESTDIR=\"\$(DESTDIR)\" RELOC_COMPILE_COMMAND=\"\$(CC) \$(CPPFLAGS) \$(CFLAGS) \$(LDFLAGS)\" RELOC_SRCDIR=\"\$(RELOCATABLE_SRC_DIR)\" RELOC_BUILDDIR=\"\$(RELOCATABLE_BUILD_DIR)\" RELOC_CONFIG_H_DIR=\"\$(RELOCATABLE_CONFIG_H_DIR)\" RELOC_EXEEXT=\"\$(EXEEXT)\" RELOC_STRIP_PROG=\"\$(RELOCATABLE_STRIP)\" RELOC_INSTALL_PROG=\"$INSTALL_PROGRAM\""
                     65:         AC_SUBST([INSTALL_PROGRAM_ENV])
                     66:         case "$ac_aux_dir" in
                     67:           /*) INSTALL_PROGRAM="$ac_aux_dir/install-reloc" ;;
                     68:           *) INSTALL_PROGRAM="\$(top_builddir)/$ac_aux_dir/install-reloc" ;;
                     69:         esac
                     70:       fi
                     71:     fi
                     72:   fi
                     73:   AM_CONDITIONAL([RELOCATABLE_VIA_LD],
                     74:     [test $is_noop = yes || test $use_elf_origin_trick = yes])
1.1.1.2 ! misho      75:   AM_CONDITIONAL([RELOCATABLE_VIA_WRAPPER], [test $use_wrapper = yes])
1.1       misho      76: 
                     77:   dnl RELOCATABLE_LIBRARY_PATH can be set in configure.ac. Default is empty.
                     78:   AC_SUBST([RELOCATABLE_LIBRARY_PATH])
1.1.1.2 ! misho      79: 
1.1       misho      80:   AC_SUBST([RELOCATABLE_CONFIG_H_DIR])
                     81:   AC_SUBST([RELOCATABLE_SRC_DIR])
                     82:   AC_SUBST([RELOCATABLE_BUILD_DIR])
1.1.1.2 ! misho      83: 
        !            84:   dnl Ensure RELOCATABLE_STRIP is defined in Makefiles (at least those
        !            85:   dnl generated by automake), with value ':'.
        !            86:   RELOCATABLE_STRIP=':'
        !            87:   AC_SUBST([RELOCATABLE_STRIP])
1.1       misho      88: ])
                     89: 
                     90: dnl Determine the platform dependent parameters needed to use relocatability:
                     91: dnl shlibpath_var.
                     92: AC_DEFUN([AC_LIB_LIBPATH],
                     93: [
                     94:   AC_REQUIRE([AC_LIB_PROG_LD])            dnl we use $LD
                     95:   AC_REQUIRE([AC_CANONICAL_HOST])         dnl we use $host
                     96:   AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT]) dnl we use $ac_aux_dir
                     97:   AC_CACHE_CHECK([for shared library path variable], [acl_cv_libpath], [
                     98:     LD="$LD" \
                     99:     ${CONFIG_SHELL-/bin/sh} "$ac_aux_dir/config.libpath" "$host" > conftest.sh
                    100:     . ./conftest.sh
                    101:     rm -f ./conftest.sh
                    102:     acl_cv_libpath=${acl_cv_shlibpath_var:-none}
                    103:   ])
                    104:   shlibpath_var="$acl_cv_shlibpath_var"
                    105: ])