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-rw-r--r--m4/guix.m417
1 files changed, 16 insertions, 1 deletions
diff --git a/m4/guix.m4 b/m4/guix.m4
index 5c846f7618..d0c5ec0f08 100644
--- a/m4/guix.m4
+++ b/m4/guix.m4
@@ -1,5 +1,5 @@
dnl GNU Guix --- Functional package management for GNU
-dnl Copyright © 2012, 2013, 2014, 2015, 2016, 2018 Ludovic Courtès <ludo@gnu.org>
+dnl Copyright © 2012, 2013, 2014, 2015, 2016, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
dnl Copyright © 2014 Mark H Weaver <mhw@netris.org>
dnl Copyright © 2017 Efraim Flashner <efraim@flashner.co.il>
dnl
@@ -312,6 +312,21 @@ AC_DEFUN([GUIX_LIBZ_LIBDIR], [
$1="$guix_cv_libz_libdir"
])
+dnl GUIX_LIBLZ_FILE_NAME VAR
+dnl
+dnl Attempt to determine liblz's absolute file name; store the result in VAR.
+AC_DEFUN([GUIX_LIBLZ_FILE_NAME], [
+ AC_REQUIRE([PKG_PROG_PKG_CONFIG])
+ AC_CACHE_CHECK([lzlib's file name],
+ [guix_cv_liblz_libdir],
+ [old_LIBS="$LIBS"
+ LIBS="-llz"
+ AC_LINK_IFELSE([AC_LANG_SOURCE([int main () { return LZ_decompress_open(); }])],
+ [guix_cv_liblz_libdir="`ldd conftest$EXEEXT | grep liblz | sed '-es/.*=> \(.*\) .*$/\1/g'`"])
+ LIBS="$old_LIBS"])
+ $1="$guix_cv_liblz_libdir"
+])
+
dnl GUIX_CURRENT_LOCALSTATEDIR
dnl
dnl Determine the localstatedir of an existing Guix installation and set