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      1 # lib-prefix.m4 serial 5 (gettext-0.15)
      2 dnl Copyright (C) 2001-2005 Free Software Foundation, Inc.
      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 AC_LIB_ARG_WITH is synonymous to AC_ARG_WITH in autoconf-2.13, and
     10 dnl similar to AC_ARG_WITH in autoconf 2.52...2.57 except that is doesn't
     11 dnl require excessive bracketing.
     12 ifdef([AC_HELP_STRING],
     13 [AC_DEFUN([AC_LIB_ARG_WITH], [AC_ARG_WITH([$1],[[$2]],[$3],[$4])])],
     14 [AC_DEFUN([AC_][LIB_ARG_WITH], [AC_ARG_WITH([$1],[$2],[$3],[$4])])])
     15 
     16 dnl AC_LIB_PREFIX adds to the CPPFLAGS and LDFLAGS the flags that are needed
     17 dnl to access previously installed libraries. The basic assumption is that
     18 dnl a user will want packages to use other packages he previously installed
     19 dnl with the same --prefix option.
     20 dnl This macro is not needed if only AC_LIB_LINKFLAGS is used to locate
     21 dnl libraries, but is otherwise very convenient.
     22 AC_DEFUN([AC_LIB_PREFIX],
     23 [
     24   AC_BEFORE([$0], [AC_LIB_LINKFLAGS])
     25   AC_REQUIRE([AC_PROG_CC])
     26   AC_REQUIRE([AC_CANONICAL_HOST])
     27   AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
     28   AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
     29   dnl By default, look in $includedir and $libdir.
     30   use_additional=yes
     31   AC_LIB_WITH_FINAL_PREFIX([
     32     eval additional_includedir=\"$includedir\"
     33     eval additional_libdir=\"$libdir\"
     34   ])
     35   AC_LIB_ARG_WITH([lib-prefix],
     36 [  --with-lib-prefix[=DIR] search for libraries in DIR/include and DIR/lib
     37   --without-lib-prefix    don't search for libraries in includedir and libdir],
     38 [
     39     if test "X$withval" = "Xno"; then
     40       use_additional=no
     41     else
     42       if test "X$withval" = "X"; then
     43         AC_LIB_WITH_FINAL_PREFIX([
     44           eval additional_includedir=\"$includedir\"
     45           eval additional_libdir=\"$libdir\"
     46         ])
     47       else
     48         additional_includedir="$withval/include"
     49         additional_libdir="$withval/$acl_libdirstem"
     50       fi
     51     fi
     52 ])
     53   if test $use_additional = yes; then
     54     dnl Potentially add $additional_includedir to $CPPFLAGS.
     55     dnl But don't add it
     56     dnl   1. if it's the standard /usr/include,
     57     dnl   2. if it's already present in $CPPFLAGS,
     58     dnl   3. if it's /usr/local/include and we are using GCC on Linux,
     59     dnl   4. if it doesn't exist as a directory.
     60     if test "X$additional_includedir" != "X/usr/include"; then
     61       haveit=
     62       for x in $CPPFLAGS; do
     63         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
     64         if test "X$x" = "X-I$additional_includedir"; then
     65           haveit=yes
     66           break
     67         fi
     68       done
     69       if test -z "$haveit"; then
     70         if test "X$additional_includedir" = "X/usr/local/include"; then
     71           if test -n "$GCC"; then
     72             case $host_os in
     73               linux* | gnu* | k*bsd*-gnu) haveit=yes;;
     74             esac
     75           fi
     76         fi
     77         if test -z "$haveit"; then
     78           if test -d "$additional_includedir"; then
     79             dnl Really add $additional_includedir to $CPPFLAGS.
     80             CPPFLAGS="${CPPFLAGS}${CPPFLAGS:+ }-I$additional_includedir"
     81           fi
     82         fi
     83       fi
     84     fi
     85     dnl Potentially add $additional_libdir to $LDFLAGS.
     86     dnl But don't add it
     87     dnl   1. if it's the standard /usr/lib,
     88     dnl   2. if it's already present in $LDFLAGS,
     89     dnl   3. if it's /usr/local/lib and we are using GCC on Linux,
     90     dnl   4. if it doesn't exist as a directory.
     91     if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
     92       haveit=
     93       for x in $LDFLAGS; do
     94         AC_LIB_WITH_FINAL_PREFIX([eval x=\"$x\"])
     95         if test "X$x" = "X-L$additional_libdir"; then
     96           haveit=yes
     97           break
     98         fi
     99       done
    100       if test -z "$haveit"; then
    101         if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
    102           if test -n "$GCC"; then
    103             case $host_os in
    104               linux*) haveit=yes;;
    105             esac
    106           fi
    107         fi
    108         if test -z "$haveit"; then
    109           if test -d "$additional_libdir"; then
    110             dnl Really add $additional_libdir to $LDFLAGS.
    111             LDFLAGS="${LDFLAGS}${LDFLAGS:+ }-L$additional_libdir"
    112           fi
    113         fi
    114       fi
    115     fi
    116   fi
    117 ])
    118 
    119 dnl AC_LIB_PREPARE_PREFIX creates variables acl_final_prefix,
    120 dnl acl_final_exec_prefix, containing the values to which $prefix and
    121 dnl $exec_prefix will expand at the end of the configure script.
    122 AC_DEFUN([AC_LIB_PREPARE_PREFIX],
    123 [
    124   dnl Unfortunately, prefix and exec_prefix get only finally determined
    125   dnl at the end of configure.
    126   if test "X$prefix" = "XNONE"; then
    127     acl_final_prefix="$ac_default_prefix"
    128   else
    129     acl_final_prefix="$prefix"
    130   fi
    131   if test "X$exec_prefix" = "XNONE"; then
    132     acl_final_exec_prefix='${prefix}'
    133   else
    134     acl_final_exec_prefix="$exec_prefix"
    135   fi
    136   acl_save_prefix="$prefix"
    137   prefix="$acl_final_prefix"
    138   eval acl_final_exec_prefix=\"$acl_final_exec_prefix\"
    139   prefix="$acl_save_prefix"
    140 ])
    141 
    142 dnl AC_LIB_WITH_FINAL_PREFIX([statement]) evaluates statement, with the
    143 dnl variables prefix and exec_prefix bound to the values they will have
    144 dnl at the end of the configure script.
    145 AC_DEFUN([AC_LIB_WITH_FINAL_PREFIX],
    146 [
    147   acl_save_prefix="$prefix"
    148   prefix="$acl_final_prefix"
    149   acl_save_exec_prefix="$exec_prefix"
    150   exec_prefix="$acl_final_exec_prefix"
    151   $1
    152   exec_prefix="$acl_save_exec_prefix"
    153   prefix="$acl_save_prefix"
    154 ])
    155 
    156 dnl AC_LIB_PREPARE_MULTILIB creates a variable acl_libdirstem, containing
    157 dnl the basename of the libdir, either "lib" or "lib64".
    158 AC_DEFUN([AC_LIB_PREPARE_MULTILIB],
    159 [
    160   dnl There is no formal standard regarding lib and lib64. The current
    161   dnl practice is that on a system supporting 32-bit and 64-bit instruction
    162   dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit
    163   dnl libraries go under $prefix/lib. We determine the compiler's default
    164   dnl mode by looking at the compiler's library search path. If at least
    165   dnl of its elements ends in /lib64 or points to a directory whose absolute
    166   dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the
    167   dnl default, namely "lib".
    168   acl_libdirstem=lib
    169   searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'`
    170   if test -n "$searchpath"; then
    171     acl_save_IFS="${IFS= 	}"; IFS=":"
    172     for searchdir in $searchpath; do
    173       if test -d "$searchdir"; then
    174         case "$searchdir" in
    175           */lib64/ | */lib64 ) acl_libdirstem=lib64 ;;
    176           *) searchdir=`cd "$searchdir" && pwd`
    177              case "$searchdir" in
    178                */lib64 ) acl_libdirstem=lib64 ;;
    179              esac ;;
    180         esac
    181       fi
    182     done
    183     IFS="$acl_save_IFS"
    184   fi
    185 ])
    186