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Diffstat (limited to 'm4/multilib.m4')
-rw-r--r-- | m4/multilib.m4 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/m4/multilib.m4 b/m4/multilib.m4 new file mode 100644 index 0000000..8d991d8 --- /dev/null +++ b/m4/multilib.m4 @@ -0,0 +1,43 @@ +# The AC_MULTILIB macro was extracted and modified from +# gettext-0.15's AC_LIB_PREPARE_MULTILIB macro in the lib-prefix.m4 file +# so that the correct paths can be used for 64-bit libraries. +# +dnl Copyright (C) 2001-2005 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_MULTILIB creates a variable libdirsuffix, containing +dnl the suffix of the libdir, either "" or "64". +dnl Only do this if the given enable parameter is "yes". +AC_DEFUN([AC_MULTILIB], +[ + dnl There is no formal standard regarding lib and lib64. The current + dnl practice is that on a system supporting 32-bit and 64-bit instruction + dnl sets or ABIs, 64-bit libraries go under $prefix/lib64 and 32-bit + dnl libraries go under $prefix/lib. We determine the compiler's default + dnl mode by looking at the compiler's library search path. If at least + dnl of its elements ends in /lib64 or points to a directory whose absolute + dnl pathname ends in /lib64, we assume a 64-bit ABI. Otherwise we use the + dnl default, namely "lib". + enable_lib64="$1" + libdirsuffix="" + searchpath=`(LC_ALL=C $CC -print-search-dirs) 2>/dev/null | sed -n -e 's,^libraries: ,,p' | sed -e 's,^=,,'` + if test "$enable_lib64" = "yes" -a -n "$searchpath"; then + save_IFS="${IFS= }"; IFS=":" + for searchdir in $searchpath; do + if test -d "$searchdir"; then + case "$searchdir" in + */lib64/ | */lib64 ) libdirsuffix=64 ;; + *) searchdir=`cd "$searchdir" && pwd` + case "$searchdir" in + */lib64 ) libdirsuffix=64 ;; + esac ;; + esac + fi + done + IFS="$save_IFS" + fi + AC_SUBST(libdirsuffix) +]) |