[Qemu-devel] [PATCH] configure: Add pkg-config handling for libgcrypt

[<zhe.he@windriver.com>]

From: He Zhe <zhe.he@windriver.com>

libgcrypt may also be controlled by pkg-config, this patch adds pkg-config
handling for libgcrypt.

Signed-off-by: He Zhe <zhe.he@windriver.com>
---
 configure | 48 ++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 40 insertions(+), 8 deletions(-)

diff --git a/configure b/configure
index e44e454..0f362a7 100755
--- a/configure
+++ b/configure
@@ -2875,6 +2875,30 @@ has_libgcrypt() {
     return 0
 }
 
+has_libgcrypt_pkgconfig() {
+    if ! has $pkg_config ; then
+        return 1
+    fi
+
+    if ! $pkg_config --list-all | grep libgcrypt > /dev/null 2>&1 ; then
+        return 1
+    fi
+
+    if test -n "$cross_prefix" ; then
+        host=$($pkg_config --variable=host libgcrypt)
+        if test "${host%-gnu}-" != "${cross_prefix%-gnu}" ; then
+            print_error "host($host) does not match cross_prefix($cross_prefix)"
+            return 1
+        fi
+    fi
+
+    if ! $pkg_config --atleast-version=1.5.0 libgcrypt ; then
+        print_error "libgcrypt version is $($pkg_config --modversion libgcrypt)"
+        return 1
+    fi
+
+    return 0
+}
 
 if test "$nettle" != "no"; then
     pass="no"
@@ -2902,7 +2926,14 @@ fi
 
 if test "$gcrypt" != "no"; then
     pass="no"
-    if has_libgcrypt; then
+    if has_libgcrypt_pkgconfig; then
+        gcrypt_cflags=$($pkg_config --cflags libgcrypt)
+        if test "$static" = "yes" ; then
+            gcrypt_libs=$($pkg_config --libs --static libgcrypt)
+        else
+            gcrypt_libs=$($pkg_config --libs libgcrypt)
+        fi
+    elif has_libgcrypt; then
         gcrypt_cflags=$(libgcrypt-config --cflags)
         gcrypt_libs=$(libgcrypt-config --libs)
         # Debian has removed -lgpg-error from libgcrypt-config
@@ -2912,15 +2943,16 @@ if test "$gcrypt" != "no"; then
         then
             gcrypt_libs="$gcrypt_libs -lgpg-error"
         fi
+    fi
 
-        # Link test to make sure the given libraries work (e.g for static).
-        write_c_skeleton
-        if compile_prog "" "$gcrypt_libs" ; then
-            LIBS="$gcrypt_libs $LIBS"
-            QEMU_CFLAGS="$QEMU_CFLAGS $gcrypt_cflags"
-            pass="yes"
-        fi
+    # Link test to make sure the given libraries work (e.g for static).
+    write_c_skeleton
+    if compile_prog "" "$gcrypt_libs" ; then
+	    LIBS="$gcrypt_libs $LIBS"
+	    QEMU_CFLAGS="$QEMU_CFLAGS $gcrypt_cflags"
+	    pass="yes"
     fi
+
     if test "$pass" = "yes"; then
         gcrypt="yes"
         cat > $TMPC << EOF
-- 
2.7.4