qtbase/cmake/FindWrapResolv.cmake
Mårten Nordheim 79d32d5b02 Fix FindWrapResolv on systems that complaing about uninit vars
The compile test would fail on certain systems due to usage of
uninitialized variable.

Amends 4a46ba1209907796f4a14f6feb35ed4d70155d7d

Fixes: QTBUG-120141
Pick-to: 6.6
Change-Id: I4ebbd9dcc820a26c4f8cec0460c5dacbd85c4d4a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
(cherry picked from commit 75964763660cb131a0afe7b0bc051fd901939821)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
2023-12-17 17:57:23 +00:00

54 lines
1.4 KiB
CMake

# Copyright (C) 2022 The Qt Company Ltd.
# Copyright (C) 2023 Intel Corpotation.
# SPDX-License-Identifier: BSD-3-Clause
# We can't create the same interface imported target multiple times, CMake will complain if we do
# that. This can happen if the find_package call is done in multiple different subdirectories.
if(TARGET WrapResolv::WrapResolv)
set(WrapResolv_FOUND ON)
return()
endif()
set(WrapResolv_FOUND OFF)
include(CheckCXXSourceCompiles)
include(CMakePushCheckState)
if(QNX)
find_library(LIBRESOLV socket)
else()
find_library(LIBRESOLV resolv)
endif()
cmake_push_check_state()
if(LIBRESOLV)
list(APPEND CMAKE_REQUIRED_LIBRARIES "${LIBRESOLV}")
endif()
check_cxx_source_compiles("
#include <netinet/in.h>
#include <resolv.h>
int main(int, char **argv)
{
res_state statep = 0;
int n = res_nmkquery(statep, 0, argv[1], 0, 0, NULL, 0, NULL, NULL, 0);
n = res_nsend(statep, NULL, 0, NULL, 0);
n = dn_expand(NULL, NULL, NULL, NULL, 0);
return n;
}
" HAVE_LIBRESOLV_FUNCTIONS)
cmake_pop_check_state()
if(HAVE_LIBRESOLV_FUNCTIONS)
set(WrapResolv_FOUND ON)
add_library(WrapResolv::WrapResolv INTERFACE IMPORTED)
if(LIBRESOLV)
target_link_libraries(WrapResolv::WrapResolv INTERFACE "${LIBRESOLV}")
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(WrapResolv DEFAULT_MSG WrapResolv_FOUND)