configure: Fix possible regressions with trunk autoconf (vs 2.71)
Signed-off-by: Cosmin Truta <ctruta@gmail.com>
diff --git a/configure.ac b/configure.ac
index 58dddd8..a553f8a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -138,7 +138,8 @@
AC_C_RESTRICT
# Checks for library functions.
-AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)))
+AC_CHECK_FUNCS([pow], ,
+ [AC_CHECK_LIB([m], [pow], , [AC_MSG_ERROR([cannot find pow])])])
# Some later POSIX 1003.1 functions are required for test programs, failure
# here is soft (the corresponding test program is not built).
@@ -150,8 +151,9 @@
[prefix that may have been used in installed zlib]),
[ZPREFIX=${withval}],
[ZPREFIX='z_'])
-AC_CHECK_LIB(z, zlibVersion, ,
- AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
+AC_CHECK_LIB([z], [zlibVersion], ,
+ [AC_CHECK_LIB([z], [${ZPREFIX}zlibVersion], ,
+ [AC_MSG_ERROR([zlib not installed])])])
# The following is for pngvalid, to ensure it catches FP errors even on
# platforms that don't enable FP exceptions, the function appears in the math
