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pkg.m4.in: Check if $pkg_cv_[]$1[]_LIBS works

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It is quite normal to have headers without library on multilib OSes.
Add AC_TRY_LINK to PKG_CHECK_MODULES to check if $pkg_cv_[]$1[]_LIBS
works.
This commit is contained in:
H.J. Lu 2020-07-28 06:41:50 -07:00
parent eb866ade77
commit 2a2a91885a
1 changed files with 8 additions and 0 deletions
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8
pkg.m4.in
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@ -147,6 +147,14 @@ AC_MSG_CHECKING([for $2])
_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_[]$1[]_LIBS"
AC_TRY_LINK([],[], [], [pkg_failed=yes])
LDFLAGS=$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.
See the pkg-config man page for more details.])