[Qemu-devel] [PATCH] configure: For libgcrypt if pkg-config is available use it

[Nathan Rossi <nathan@nathanrossi.com>]

If libgcrypt info is available with pkg-config use it over using the
libgcrypt-config. pkg-config is preferred due to is compatibility with
cross-compilation (where you cannot execute the targets version of
libgcrypt-config).

This change makes configure check for libgcrypt in pkg-config first,
then falling back to use libgcrypt-config if available. This follows a
similar process to how libsdl is handled.

Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
---
 configure | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 218df87d21..6558121de8 100755
--- a/configure
+++ b/configure
@@ -2386,9 +2386,17 @@ has_libgcrypt_config() {
 }
 
 if test "$gcrypt" != "no"; then
-    if has_libgcrypt_config; then
-        gcrypt_cflags=$(libgcrypt-config --cflags)
-        gcrypt_libs=$(libgcrypt-config --libs)
+    gcrypt_config=""
+    # If libgcrypt in pkg-config use it over using libgcrypt-config
+    if $pkg_config --exists "libgcrypt"; then
+      gcrypt_config="$pkg_config libgcrypt"
+    elif has_libgcrypt_config; then
+      gcrypt_config="libgcrypt-config"
+    fi
+
+    if test -n "$gcrypt_config"; then
+        gcrypt_cflags=$($gcrypt_config --cflags)
+        gcrypt_libs=$($gcrypt_config --libs)
         # Debian has remove -lgpg-error from libgcrypt-config
         # as it "spreads unnecessary dependencies" which in
         # turn breaks static builds...
-- 
2.11.0