Merge pull request #66 from d3m3vilurr/fix-cpp-thread

Fix crash with using C++ thread

CMakeLists.txt

@@ -622,7 +622,9 @@ ExternalProject_add(gcc-final
     URL http://ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz
     URL_HASH ${GCC_HASH}
     DOWNLOAD_DIR ${DOWNLOAD_DIR}
-    PATCH_COMMAND patch -d <SOURCE_DIR> -p3 -t -N < ${PROJECT_SOURCE_DIR}/patches/gcc/0001-gcc-8.patch
+    PATCH_COMMAND
+        patch -d <SOURCE_DIR> -p3 -t -N < ${PROJECT_SOURCE_DIR}/patches/gcc/0001-gcc-8.patch
+        && patch -d <SOURCE_DIR> -p1 -t -N < ${PROJECT_SOURCE_DIR}/patches/gcc/0002-gcc-9-pthread.patch
     CONFIGURE_COMMAND ${compiler_flags} ${toolchain_tools} ${compiler_target_tools}
     ${wrapper_command} <SOURCE_DIR>/configure
     --build=${build_native}

patches/gcc/0002-gcc-9-pthread.patch

@@ -0,0 +1,13 @@
+diff -uHNr gcc-9.1.0.orig/libgcc/gthr-posix.h gcc-9.1.0/libgcc/gthr-posix.h
+--- gcc-9.1.0.orig/libgcc/gthr-posix.h	2020-04-16 04:40:41.864017273 +0900
++++ gcc-9.1.0/libgcc/gthr-posix.h	2020-05-01 06:31:36.844109263 +0900
+@@ -29,6 +29,9 @@
+ /* POSIX threads specific definitions.
+    Easy, since the interface is just one-to-one mapping.  */
+
++#undef GTHREAD_USE_WEAK
++#define GTHREAD_USE_WEAK 0
++
+ #define __GTHREADS 1
+ #define __GTHREADS_CXX0X 1
+