From 54df8dfd9a0862ce4fd9fe3752cc97a4124130c2 Mon Sep 17 00:00:00 2001
From: Gleb Popov <6yearold@gmail.com>
Date: Sun, 3 May 2026 18:12:24 +0300
Subject: [PATCH] Check if -static-{libgcc,libstdc++} flags are supported
 before passing them

Clang does not support these flags and -static is enough to link everything
statically.

This fixes build on FreeBSD.
---
 src/CMakeLists.txt | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5b369ac..9ff00b3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -14,6 +14,13 @@ endif()
 
 set(_target_name linuxdeploy-plugin-appimage)
 
+# Clang does not support -static-libstdc++ and -static-libgcc, but just -static
+# is enough to link everything statically. We check for these flags and only
+# use them if they're supported.
+include(CheckCXXCompilerFlag)
+check_cxx_compiler_flag(-static-libstdc++ STATIC_LIBSTDCXX_SUPPORTED)
+check_cxx_compiler_flag(-static-libgcc STATIC_LIBGCC_SUPPORTED)
+
 # main executable
 add_executable(${_target_name} main.cpp)
 
@@ -21,10 +28,14 @@ target_link_libraries(${_target_name} args)
 
 set(_cflags
     -static
-    -static-libstdc++
-    -static-libgcc
     -flto
 )
+if(STATIC_LIBSTDCXX_SUPPORTED)
+    list(APPEND _cflags -static-libstdc++)
+endif()
+if(STATIC_LIBGCC_SUPPORTED)
+    list(APPEND _cflags -static-libgcc)
+endif()
 target_compile_options(${_target_name} PUBLIC ${_cflags})
 target_link_options(${_target_name} PUBLIC ${_cflags})