X-Git-Url: https://git.draconx.ca/gitweb/liblbx.git/blobdiff_plain/f5f0ccae3a2580fb18763260646902bc614da321..3d1e13378f4e3cd29bd2698fed4552024f87e9c2:/m4/md5sum.m4

diff --git a/m4/md5sum.m4 b/m4/md5sum.m4
new file mode 100644
index 0000000..d3926ba
--- /dev/null
+++ b/m4/md5sum.m4
@@ -0,0 +1,20 @@
+AC_DEFUN([DX_PROG_MD5SUM], [dnl
+AC_CHECK_PROGS([MD5SUM], [md5sum], [false])
+AC_CACHE_CHECK([whether md5sum works], [dx_cv_md5sum_works], [dnl
+	dx_cv_md5sum_works=yes
+	# Positive test
+	cat >conftest.md5 <<'EOF'
+d41d8cd98f00b204e9800998ecf8427e  /dev/null
+EOF
+	if $MD5SUM -c conftest.md5 >/dev/null 2>&1; then :; else
+		dx_cv_md5sum_works=no
+	fi
+	# Negative test
+	cat >conftest.md5 <<'EOF'
+d41d8cd98f00b204e9810998ecf8427e  /dev/null
+EOF
+	if $MD5SUM -c conftest.md5 >/dev/null 2>&1; then
+		dx_cv_md5sum_works=no
+	fi
+	rm -f conftest.md5
+])])