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configure.ac: Error out if pkg-config is missing

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With pkg-config missing, a broken configure was generated, that failed
with a confusing error:

	./configure: line 19272: syntax error near unexpected token `OPENSSL,'
	./configure: line 19272: `    PKG_CHECK_MODULES(OPENSSL, openssl >= 0.9.7,'

Now, it errors out in the autoconf stage with:

	configure.ac:23: error: possibly undefined macro: PKG_CHECK_MODULES
	      If this token and others are legitimate, please use m4_pattern_allow.
	      See the Autoconf documentation.
This commit is contained in:
Jakob Unterwurzacher 2015-01-13 22:32:46 +01:00
parent 49527fcdf6
commit bc4f38fcca
1 changed files with 6 additions and 0 deletions
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configure.ac
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@ -14,6 +14,12 @@ dnl without this order in this file, automake will be confused!
dnl
AM_CONFIG_HEADER(config.h)
dnl If the string "PKG_CHECK_MODULES" appears in the output,
dnl the macro was not substituted, probably because pkg-config is
dnl not installed. Catch that right here instead of creating a
dnl broken configure script.
m4_pattern_forbid([PKG_CHECK_MODULES])
dnl This ksh/zsh feature conflicts with `cd blah ; pwd`
unset CDPATH