autoconf: Fail from autoconf if the pkg-config macros aren't defined
Instead of postponing the error from missing pkg-config macros to when
configure is run, make autoconf exit by using m4 macros.
diff --git a/configure.ac b/configure.ac
index 43111b3..672bab8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,9 +36,14 @@
dnl Make sure the pkg-config macros are defined
m4_ifdef([PKG_PROG_PKG_CONFIG],,[
- AC_MSG_ERROR([The pkg-config autoconf macros are not defined.
- Did you run 'make configure'?])]
-)
+ m4_errprint([Error: Could not locate the pkg-config autoconf macros.
+ These are usually located in /usr/share/aclocal/pkg.m4. If your
+ macros are in a different location, try setting the environment
+ variable ACLOCAL="aclocal -I/other/macro/dir" before running
+ autoreconf.
+])
+ m4_exit([1])
+])
PKG_PROG_PKG_CONFIG()
dnl LIB_DIR - library basename