From 0325fa9496e622200506ead78db8df2209fb39d2 Mon Sep 17 00:00:00 2001
From: Martin Hauke <mardnh@gmx.de>
Date: Tue, 24 Apr 2018 20:47:38 +0200
Subject: [PATCH] Fix build with MinGW

Signed-off-by: Steve Markgraf <steve@steve-m.de>
---
 CMakeLists.txt     | 4 +++-
 src/CMakeLists.txt | 9 +++++++--
 src/rds_mod.c      | 6 ++++++
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 813e5c7..0a3b5e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,7 +60,9 @@ endif()
 ########################################################################
 find_package(PkgConfig)
 find_package(LibUSB)
-set(THREADS_USE_PTHREADS_WIN32 true)
+if(WIN32 AND NOT MINGW)
+    set(THREADS_USE_PTHREADS_WIN32 true)
+endif()
 find_package(Threads)
 
 if(NOT LIBUSB_FOUND)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 2255598..1d788de 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -61,7 +61,7 @@ endif()
 ########################################################################
 # Setup libraries used in executables
 ########################################################################
-if(WIN32)
+if(WIN32 AND NOT MINGW)
 add_library(libgetopt_static STATIC
     getopt/getopt.c
 )
@@ -105,7 +105,7 @@ target_link_libraries(fl2k_test m)
 target_link_libraries(fl2k_fm m)
 endif()
 
-if(WIN32)
+if(WIN32 AND NOT MINGW)
 target_link_libraries(fl2k_file libgetopt_static)
 target_link_libraries(fl2k_tcp ws2_32 libgetopt_static)
 target_link_libraries(fl2k_test libgetopt_static)
@@ -115,6 +115,11 @@ set_property(TARGET fl2k_tcp APPEND PROPERTY COMPILE_DEFINITIONS "libosmo-fl2k_S
 set_property(TARGET fl2k_test APPEND PROPERTY COMPILE_DEFINITIONS "libosmo-fl2k_STATIC" )
 set_property(TARGET fl2k_fm APPEND PROPERTY COMPILE_DEFINITIONS "libosmo-fl2k_STATIC" )
 endif()
+
+if(MINGW)
+target_link_libraries(fl2k_tcp ws2_32)
+endif()
+
 ########################################################################
 # Install built library files & utilities
 ########################################################################
diff --git a/src/rds_mod.c b/src/rds_mod.c
index 865ca11..8e31b0d 100644
--- a/src/rds_mod.c
+++ b/src/rds_mod.c
@@ -109,7 +109,13 @@ int get_rds_ct_group(uint16_t *blocks)
 
 		utc = localtime(&now);
 
+		//'struct tm' has no member named 'tm_gmtoff' on Windows+MinGW
+		#if defined(__APPLE__) || defined(__FreeBSD__)
 		offset = utc->tm_gmtoff / (30 * 60);
+		#else
+		offset = time(NULL) / (30 * 60);
+		#endif
+
 		blocks[3] |= abs(offset);
 		if (offset < 0)
 			blocks[3] |= 0x20;