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configure: Work around broken static pkg-config info for Ubuntu gnutls

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Unfortunately Ubuntu's pkg-config information for gnutls is broken
for the static linking case, and outputs --libs options which the
compiler does not recognize. Work around this problem by testing
that the --cflags/--libs output will at least allow compilation
before enabling gnutls support.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1437758888-22486-1-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2015-07-24 18:28:08 +01:00
parent 122e7dab8a
commit 3737129917
1 changed files with 17 additions and 1 deletions
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18
configure vendored
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@ -2116,10 +2116,26 @@ fi
##########################################
# GNUTLS probe
gnutls_works() {
# Unfortunately some distros have bad pkg-config information for gnutls
# such that it claims to exist but you get a compiler error if you try
# to use the options returned by --libs. Specifically, Ubuntu for --static
# builds doesn't work:
# https://bugs.launchpad.net/ubuntu/+source/gnutls26/+bug/1478035
#
# So sanity check the cflags/libs before assuming gnutls can be used.
if ! $pkg_config --exists "gnutls"; then
return 1
fi
write_c_skeleton
compile_prog "$($pkg_config --cflags gnutls)" "$($pkg_config --libs gnutls)"
}
gnutls_gcrypt=no
gnutls_nettle=no
if test "$gnutls" != "no"; then
if $pkg_config --exists "gnutls"; then
if gnutls_works; then
gnutls_cflags=`$pkg_config --cflags gnutls`
gnutls_libs=`$pkg_config --libs gnutls`
libs_softmmu="$gnutls_libs $libs_softmmu"