buildroot/package/rtl_433/0001-CMakeLists.txt-use-pkg-config-to-detect-openssl-when.patch

From b860de9e207d8fe2ea37dad28fdd014493d87703 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Tue, 27 Dec 2022 16:29:16 +0100
Subject: [PATCH] build: Fix CMake to use pkg-config openssl when possible
 (#2290)

In order to take into account the libraries used by openssl when
building statically, using pkg-config is recommended. This patch
therefore improves the CMakeLists.txt to use pkg-config to detect
openssl when pkg-config is available. This will avoid
static build failure when openssl needs to link with -latomic.

Fixes:
 - http://autobuild.buildroot.org/results/417c86963ffe038aa052ea3cf19fd52c3e9b7396

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Retrieved from:
https://github.com/merbanan/rtl_433/commit/b860de9e207d8fe2ea37dad28fdd014493d87703]
---
 CMakeLists.txt | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d47a3eda2..cf30d8be2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -175,7 +175,14 @@ set(ENABLE_OPENSSL AUTO CACHE STRING "Enable OpenSSL TLS support")
 set_property(CACHE ENABLE_OPENSSL PROPERTY STRINGS AUTO ON OFF)
 if(ENABLE_OPENSSL) # AUTO / ON
 
-find_package(OpenSSL)
+find_package(PkgConfig)
+if(PKG_CONFIG_FOUND)
+    pkg_check_modules(OPENSSL openssl)
+    set(OPENSSL_LIBRARIES ${OPENSSL_LINK_LIBRARIES})
+    set(OPENSSL_INCLUDE_DIR ${OPENSSL_INCLUDE_DIRS})
+else()
+    find_package(OpenSSL)
+endif()
 if(OPENSSL_FOUND)
     message(STATUS "OpenSSL TLS support will be compiled. Found version ${OPENSSL_VERSION}")
     include_directories(${OPENSSL_INCLUDE_DIR})