diff options
Diffstat (limited to 'build/autoconf')
| -rw-r--r-- | build/autoconf/la_syslibsearchpath.m4 | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/build/autoconf/la_syslibsearchpath.m4 b/build/autoconf/la_syslibsearchpath.m4 new file mode 100644 index 00000000..8edd81ce --- /dev/null +++ b/build/autoconf/la_syslibsearchpath.m4 @@ -0,0 +1,84 @@ +# la_syslibsearchpath.m4 - attempt to determine the compiler's +# library search directories. +# sets $la_sys_lib_search_path_spec to space-separated list of +# directories, specifing the compiler's built-in search path +# for libraries. This is used by configure.ac when $host_os is +# cygwin, to locate a special *object* we need to link against: +# binmode.o. We know this object is located in that search path. +# However, because gcc does not search for objects in its +# libsearchpath (there is no -l for .o's), we must extract the +# path(s) and search manually. +# +# Adapted from libtool.m4 (_LT_SYS_DYNAMIC_LINKER): +# +# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, +# 2006, 2007, 2008, 2009 Free Software Foundation, Inc. +# Written by Gordon Matzigkeit, 1996 +# +# This file is free software; the Free Software Foundation gives +# unlimited permission to copy and/or distribute it, with or without +# modifications, as long as this notice is preserved. +AC_DEFUN([LA_SYS_LIB_SEARCH_PATH], +[AC_REQUIRE([AC_CANONICAL_HOST])dnl +AC_REQUIRE([AC_PROG_CC])dnl +AC_REQUIRE([AC_PROG_SED])dnl +AC_REQUIRE([AC_PROG_AWK])dnl +AC_MSG_CHECKING([compiler library search path]) +# don't bother with EBCDIC systems here: +la_NL2SP="tr \\015\\012 \\040\\040" +if test "$GCC" = yes; then + case $host_os in + darwin*) la_awk_arg="/^libraries:/,/LR/" ;; + *) la_awk_arg="/^libraries:/" ;; + esac + la_search_path_spec=`$CC -print-search-dirs | $AWK $la_awk_arg | $SED -e "s/^libraries://" -e "s,=/,/,g"` + case $la_search_path_spec in + *\;*) + # if the path contains ";" then we assume it to be the separator + # otherwise default to the standard path separator (i.e. ":") - it is + # assumed that no part of a normal pathname contains ";" but that should + # okay in the real world where ";" in dirpaths is itself problematic. + la_search_path_spec=`echo "$la_search_path_spec" | $SED 's/;/ /g'` + ;; + *) + la_search_path_spec=`echo "$la_search_path_spec" | $SED "s/$PATH_SEPARATOR/ /g"` + ;; + esac + # Ok, now we have the path, separated by spaces, we can step through it + # and add multilib dir if necessary. + la_tmp_la_search_path_spec= + la_multi_os_dir=`$CC $CPPFLAGS $CFLAGS $LDFLAGS -print-multi-os-directory 2>/dev/null` + for la_sys_path in $la_search_path_spec; do + if test -d "$la_sys_path/$la_multi_os_dir"; then + la_tmp_la_search_path_spec="$la_tmp_la_search_path_spec $la_sys_path/$la_multi_os_dir" + else + test -d "$la_sys_path" && \ + la_tmp_la_search_path_spec="$la_tmp_la_search_path_spec $la_sys_path" + fi + done + la_search_path_spec=`echo "$la_tmp_la_search_path_spec" | $AWK ' +BEGIN {RS=" "; FS="/|\n";} { + la_foo=""; + la_count=0; + for (la_i = NF; la_i > 0; la_i--) { + if ($la_i != "" && $la_i != ".") { + if ($la_i == "..") { + la_count++; + } else { + if (la_count == 0) { + la_foo="/" $la_i la_foo; + } else { + la_count--; + } + } + } + } + if (la_foo != "") { la_freq[[la_foo]]++; } + if (la_freq[[la_foo]] == 1) { print la_foo; } +}'` + la_sys_lib_search_path_spec=`echo "$la_search_path_spec" | $la_NL2SP` +else + la_sys_lib_search_path_spec="/lib /usr/lib /usr/local/lib" +fi +AC_MSG_RESULT($la_sys_lib_search_path_spec)]) + |