From c84f9942d7d57463c4790c8e0aad67c096c71415 Mon Sep 17 00:00:00 2001
From: Frediano Ziglio <freddy77@gmail.com>
Date: Wed, 4 Nov 2020 13:09:01 +0000
Subject: Better error reporting if zlib or libpng are not static
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Tell the specific library which is not static.
Previously any would be reported as libpng.

This fixes https://gitlab.freedesktop.org/spice/win32/vd_agent/-/issues/17

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Acked-by: Jakub Janků <jjanku@redhat.com>
---
 configure.ac | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 312b88a..b55389d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -103,8 +103,27 @@ dnl ---------------------------------------------------------------------------
 dnl - Check library dependencies
 dnl ---------------------------------------------------------------------------
 
-PKG_CHECK_MODULES_STATIC(LIBPNG, [libpng])
+ACX_SET_VAR(CFLAGS, "$CFLAGS -Wall",
+  ACX_SET_VAR(LDFLAGS, "$LDFLAGS -static",
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[
+      printf("hello");
+      return 0
+    ]])], [], AC_MSG_ERROR([some base static library (possibly pthread) not found]))
+  )
+)
+
 PKG_CHECK_MODULES_STATIC(ZLIB, [zlib])
+ACX_SET_VAR(CFLAGS, "$CFLAGS $ZLIB_CFLAGS -Wall",
+  ACX_SET_VAR(LDFLAGS, "$LDFLAGS -static",
+    ACX_SET_VAR(LIBS, "$LIBS $ZLIB_LIBS",
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <zlib.h>]], [[
+        return !!zlibVersion()
+      ]])], [], AC_MSG_ERROR([static zlib not found]))
+    )
+  )
+)
+
+PKG_CHECK_MODULES_STATIC(LIBPNG, [libpng])
 ACX_SET_VAR(CFLAGS, "$CFLAGS $LIBPNG_CFLAGS -Wall",
   ACX_SET_VAR(LDFLAGS, "$LDFLAGS -static",
     ACX_SET_VAR(LIBS, "$LIBS $LIBPNG_LIBS",
-- 
cgit v1.2.3