ref: 2521a7d81c40ea83e568a7085e717228932832a3
parent: c59d42b6fb4bb2b7e8c7debfa816e2641fd998b6
author: Timothy B. Terriberry <tterribe@xiph.org>
date: Tue Aug 1 12:49:32 EDT 2017
Print a useful error when pkg-config is missing Without this check, the PKG_CHECK_MODULES() macro remains unexpanded, which gives a syntax error when the shell reaches that point in the configure script, even for checks which are disabled (e.g., the OpenSSL check when using --disable-http). Instead, explicitly check for pkg-config and give the user useful advice on how to solve the problem if it's not found. Thanks to eXpl0it3r for reporting a problem for which installing pkg-config turned out to be the solution.
--- a/configure.ac
+++ b/configure.ac
@@ -88,6 +88,11 @@
)
AC_SEARCH_LIBS(ftime, [compat], , [enable_http=no])
+m4_ifndef([PKG_PROG_PKG_CONFIG],
+ [m4_fatal([Could not locate the pkg-config autoconf macros.
+Please make sure pkg-config is installed and, if necessary, set the environment
+variable ACLOCAL="aclocal -I/path/to/pkg.m4".])])
+
AS_IF([test "$enable_http" != "no"], [
openssl="openssl"
AC_DEFINE([OP_ENABLE_HTTP], [1], [Enable HTTP support])