Eirik Hatlen / gammalib

Commit cde53380fb7c04c54f8423de4e07e91f69256922

Authored by knodlseder
1 parent 5d0f0d74

initial version

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m4/ac_find_lib_headers.m4 0 → 100644
  View file @cde5338
  1 +#####
  2 +#
  3 +# SYNOPSIS
  4 +#
  5 +# AC_FIND_LIB_HEADERS(LIBRARY, FUNCTION, HEADERS
  6 +# [ACTION-IF-FOUND],
  7 +# [ACTION-IF-NOT-FOUND],
  8 +# [OTHER-LIBRARIES])
  9 +#
  10 +# DESCRIPTION
  11 +#
  12 +# This macro searches for a particular library on your system by
  13 +# scanning a number of default directories. You can use the optional
  14 +# third argument to search also for headers using AC_CHECK_HEADERS.
  15 +#
  16 +# The directories that are searched are (in the given order):
  17 +# $gammalib_prefix/lib64
  18 +# $gammalib_prefix/lib
  19 +# /opt/local/lib64 (for Mac OS X)
  20 +# /opt/local/lib (for Mac OS X)
  21 +# /usr/local/lib64
  22 +# /usr/local/lib
  23 +# /usr/lib64
  24 +# /usr/lib
  25 +# /lib64 (for readline/ncurses is some distros)
  26 +# /lib (for readline/ncurses is some distros)
  27 +#
  28 +# If the library is found, the function adds it's name to LIBS.
  29 +# Furthermore, if the library is found in a specific directory, the
  30 +# directory name is added to LDFLAGS. If the headers are found in a
  31 +# specific directory, the directory name is added to CPPFLAGS.
  32 +#
  33 +# In configure.in, use as:
  34 +#
  35 +# AC_FIND_LIB_HEADERS([readline], [readline], [], [], [], [])
  36 +#
  37 +# LAST MODIFICATION
  38 +#
  39 +# 2011-07-13
  40 +#
  41 +# COPYLEFT
  42 +#
  43 +# Copyright (c) 2011 Juergen Knodlseder <knodlseder@cesr.fr>
  44 +#
  45 +# This program is free software: you can redistribute it and/or modify
  46 +# it under the terms of the GNU General Public License as published by
  47 +# the Free Software Foundation, either version 3 of the License, or
  48 +# (at your option) any later version.
  49 +#
  50 +# This program is distributed in the hope that it will be useful,
  51 +# but WITHOUT ANY WARRANTY; without even the implied warranty of
  52 +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  53 +# GNU General Public License for more details.
  54 +#
  55 +# You should have received a copy of the GNU General Public License
  56 +# along with this program. If not, see <http://www.gnu.org/licenses/>.
  57 +
  58 +AC_DEFUN([AC_FIND_LIB_HEADER],[
  59 + #
  60 + # Initialise status
  61 + #
  62 + AS_VAR_SET([ac_find_lib_status], [no])
  63 + AS_VAR_SET([ac_find_header_status], [no])
  64 + #
  65 + # Signal checking
  66 + #
  67 + AC_MSG_CHECKING([for $2 in -l$1])
  68 + #
  69 + # Save original values
  70 + #
  71 + # echo "in: "$LIBS $LDFLAGS $CPPFLAGS
  72 + ac_find_lib_save_LIBS=$LIBS
  73 + ac_find_lib_save_LDFLAGS=$LDFLAGS
  74 + ac_find_lib_add_LDFLAGS=
  75 + ac_find_lib_base=
  76 + #
  77 + # Set link flags for testing
  78 + #
  79 + LIBS="-l$1 $6 $LIBS"
  80 + #
  81 + # Loop over all directories
  82 + #
  83 + for i in '' "$gammalib_prefix" /opt/local /usr/local /usr /; do
  84 + #
  85 + # Search library in lib64 first
  86 + #
  87 + if test -z "$i"; then
  88 + LDFLAGS="$ac_find_lib_save_LDFLAGS"
  89 + ac_message="found"
  90 + else
  91 + LDFLAGS="$ac_find_lib_save_LDFLAGS -L$i/lib64"
  92 + ac_message="found in $i/lib64"
  93 + fi
  94 + AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
  95 + [AS_VAR_SET([ac_find_lib_status], [yes])],
  96 + [AS_VAR_SET([ac_find_lib_status], [no])])
  97 + LDFLAGS=$ac_find_lib_save_LDFLAGS
  98 + if test "x$ac_find_lib_status" = "xyes"; then
  99 + if test -z "$i"; then
  100 + ac_find_lib_add_LDFLAGS=
  101 + else
  102 + ac_find_lib_add_LDFLAGS=" -L$i/lib64"
  103 + ac_find_lib_base="$i"
  104 + fi
  105 + break
  106 + fi
  107 + #
  108 + # If still alive, check library in lib next
  109 + #
  110 + if test -z "$i"; then
  111 + LDFLAGS="$ac_find_lib_save_LDFLAGS"
  112 + ac_message="found"
  113 + else
  114 + LDFLAGS="$ac_find_lib_save_LDFLAGS -L$i/lib"
  115 + ac_message="found in $i/lib"
  116 + fi
  117 + AC_LINK_IFELSE([AC_LANG_CALL([], [$2])],
  118 + [AS_VAR_SET([ac_find_lib_status], [yes])],
  119 + [AS_VAR_SET([ac_find_lib_status], [no])])
  120 + LDFLAGS=$ac_find_lib_save_LDFLAGS
  121 + if test "x$ac_find_lib_status" = "xyes"; then
  122 + if test -z "$i"; then
  123 + ac_find_lib_add_LDFLAGS=
  124 + else
  125 + ac_find_lib_add_LDFLAGS=" -L$i/lib"
  126 + ac_find_lib_base="$i"
  127 + fi
  128 + break
  129 + fi
  130 + done
  131 + #
  132 + # Recover original values
  133 + #
  134 + LIBS=$ac_find_lib_save_LIBS
  135 + LDFLAGS=$ac_find_lib_save_LDFLAGS
  136 + #
  137 + # Inform about test result
  138 + #
  139 + if test "x$ac_find_lib_status" = "xyes"; then
  140 + AC_MSG_RESULT($ac_message)
  141 + else
  142 + AC_MSG_RESULT([not found])
  143 + fi
  144 + #
  145 + # Optionally check for presence of headers (see AC_CHECK_HEADERS)
  146 + #
  147 + if test "x$3" != "x"; then
  148 + ac_find_lib_save_CPPFLAGS=$CPPFLAGS
  149 + ac_find_lib_add_CPPFLAGS=
  150 + if test -z "$ac_find_lib_base"; then
  151 + CPPFLAGS="$ac_find_lib_save_CPPFLAGS"
  152 + else
  153 + CPPFLAGS="$ac_find_lib_save_CPPFLAGS -I$ac_find_lib_base/include"
  154 + fi
  155 + AC_CHECK_HEADERS([$3],
  156 + [AS_VAR_SET([ac_find_header_status], [yes])
  157 + break])
  158 + CPPFLAGS=$ac_find_lib_save_CPPFLAGS
  159 + if test "x$ac_find_header_status" = "xyes"; then
  160 + if test -z "$ac_find_lib_base"; then
  161 + CPPFLAGS="$CPPFLAGS"
  162 + AC_MSG_NOTICE([$1 headers found])
  163 + else
  164 + CPPFLAGS="$CPPFLAGS -I$ac_find_lib_base/include"
  165 + AC_MSG_NOTICE([$1 headers found in $ac_find_lib_base/include])
  166 + fi
  167 + else
  168 + AC_MSG_WARN([No $1 headers found])
  169 + fi
  170 + AS_IF([test "$ac_find_lib_status" != no -a "ac_find_header_status" != no ],
  171 + [LIBS="-l$1 $LIBS"
  172 + LDFLAGS="$LDFLAGS $ac_find_lib_add_LDFLAGS"
  173 + $4], [$5])
  174 + else
  175 + AS_IF([test "$ac_find_lib_status" != no],
  176 + [LIBS="-l$1 $LIBS"
  177 + LDFLAGS="$LDFLAGS $ac_find_lib_add_LDFLAGS"
  178 + $4], [$5])
  179 + fi
  180 + # echo "out: "$LIBS $LDFLAGS $CPPFLAGS
  181 +])
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