diff options
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 0000000000..5e506a3870 --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,124 @@ +dnl $Id$ +dnl Helper macros for Tor configure.in +dnl Copyright (c) 2001-2004, Roger Dingledine +dnl Copyright (c) 2004-2007, Roger Dingledine, Nick Mathewson +dnl See LICENSE for licensing information + +AC_DEFUN([TOR_EXTEND_CODEPATH], +[ + if test -d "$1/lib"; then + LDFLAGS="-L$1/lib $LDFLAGS" + else + LDFLAGS="-L$1 $LDFLAGS" + fi + if test -d "$1/include"; then + CPPFLAGS="-I$1/include $CPPFLAGS" + else + CPPFLAGS="-I$1 $CPPFLAGS" + fi +]) + +dnl Look for a library, and its associated includes, and how to link +dnl against it. +dnl +dnl TOR_SEARCH_LIBRARY(libname, withlocation, linkargs, headers, prototype, +dnl code, optionname) + +AC_DEFUN([TOR_SEARCH_LIBRARY], [ +tor_saved_LIBS="$LIBS" +tor_saved_LDFLAGS="$LDFLAGS" +tor_saved_CPPFLAGS="$CPPFLAGS" +AC_CACHE_CHECK([for $1 directory], tor_cv_library_$1_dir, [ + tor_$1_dir_found=no + tor_$1_any_linkable=no + + for tor_trydir in "$2" "(system)" "$prefix" /usr/local /usr/pkg; do + LDFLAGS="$tor_saved_LDFLAGS" + LIBS="$tor_saved_LIBS $3" + CPPFLAGS="$tor_saved_CPPFLAGS" + + if test -z "$tor_trydir" ; then + continue; + fi + + # Skip the directory if it isn't there. + if test ! -d "$tor_trydir" -a "$tor_trydir" != "(system)"; then + continue; + fi + + # If this isn't blank, try adding the directory (or appropriate + # include/libs subdirectories) to the command line. + if test "$tor_trydir" != "(system)"; then + TOR_EXTEND_CODEPATH($tor_trydir) + fi + + # Can we link against (but not necessarily compile) the binary? + AC_LINK_IFELSE(AC_LANG_PROGRAM([$5], [$6]), + [linkable=yes], [linkable=no]) + + if test $linkable = yes; then + tor_$1_any_linkable=yes + AC_COMPILE_IFELSE(AC_LANG_PROGRAM([$4], [$6]), + [buildable=yes], [buildable=no]) + if test $buildable = yes; then + tor_cv_library_$1_dir=$tor_trydir + tor_$1_dir_found=yes + break + fi + fi + done + + if test $tor_$1_dir_found = no; then + if test $tor_$1_any_linkable = no ; then + AC_MSG_ERROR([Could not find a linkable $1. You can specify an explicit path using $7]) + else + AC_MSG_ERROR([We found the libraries for $1, but we could not find the C header files. You may need to install a devel package.]) + fi + fi + + LDFLAGS="$tor_saved_LDFLAGS" + LIBS="$tor_saved_LIBS $3" + CPPFLAGS="$tor_saved_CPPFLAGS" +]) dnl end cache check + +LIBS="$LIBS $3" +if test $tor_cv_library_$1_dir != "(system)"; then + TOR_EXTEND_CODEPATH($tor_cv_library_$1_dir) +fi + +if test -z "$CROSS_COMPILE"; then + AC_CACHE_CHECK([whether we need extra options to link $1], + tor_cv_library_$1_linker_option, [ + tor_saved_LDFLAGS="$LDFLAGS" + tor_trydir="$tor_cv_library_$1_dir" + runs=no + linked_with=nothing + for tor_tryextra in "(none)" "-Wl,-R$tor_trydir" "-R$tor_trydir" \ + "-Wl,-rpath,$le_libdir" ; do + if test "$tor_tryextra" = "(none)"; then + LDFLAGS="$saved_LDFLAGS" + else + LDFLAGS="$tor_tryextra $saved_LDFLAGS" + fi + AC_RUN_IFELSE(AC_LANG_PROGRAM([$5], [$6]), + [runnable=yes], [runnable=no]) + if test "$runnable" = yes; then + tor_cv_library_$1_linker_option=$tor_tryextra + break + fi + done + + if test "$runnable" = no; then + AC_MSG_ERROR([Found linkable $1 in $tor_cv_library_$1_dir, but it does not seem to run, even with -R. Maybe specify another using $7}]) + fi + ]) dnl check for extra options. + + if test "$tor_cv_library_$1_linker_option" != "(none)" ; then + LDFLAGS="$tor_cv_library_$1_linker_option $LDFLAGS" + fi +fi # cross-compile + +]) dnl end defun + +#XXXX Check for right version +#XXXX accept list of search paths as options |