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PKG_CHECK_MODULES: Properly check if $pkg_cv_[]$1[]_LIBS works

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There is no need to check $pkg_cv_[]$1[]_LIBS works if package check
failed.

config/ChangeLog:

	* pkg.m4 (PKG_CHECK_MODULES): Use AC_TRY_LINK only if
	$pkg_failed = no.
This commit is contained in:
H.J. Lu 2020-07-28 06:59:20 -07:00 committed by Arsen Arsenović
parent de9e7e9e4a
commit 161252a840
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GPG Key ID: 52C294301EA2C493
1 changed files with 6 additions and 4 deletions
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4
config/pkg.m4
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@ -148,10 +148,12 @@ _PKG_CONFIG([$1][_CFLAGS], [cflags], [$2])
_PKG_CONFIG([$1][_LIBS], [libs], [$2])
dnl Check whether $pkg_cv_[]$1[]_LIBS works.
if test $pkg_failed = no; then
pkg_save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS $pkg_cv_[]$1[]_LIBS"
AC_TRY_LINK([],[return 0;], [pkg_failed=no], [pkg_failed=yes])
AC_TRY_LINK([],[], [], [pkg_failed=yes])
LDFLAGS=$pkg_save_LDFLAGS
fi
m4_define([_PKG_TEXT], [Alternatively, you may set the environment variables $1[]_CFLAGS
and $1[]_LIBS to avoid the need to call pkg-config.