Fix crt detection for Arch Linux (#1705)

* Fix crt detection for arch linux

On archlinux, the crt is located directly in /usr/lib. Thus, the globbing done in find_linux_crt fails since it expects the crt to be in a subdirectory of /usr/lib. This patch fixes this issue.

releasenotes.md

@@ -16,6 +16,7 @@
 - `static-lib` and `dynamic-lib` options from the command line now produces headers.
 - Fix bug outputting exported functions without predefined extname.
 - Fix problem where crt1 was linked for dynamic libraries on Linux and BSD. #1710
+- Fix CRT detection on Arch Linux.
 
 ### Stdlib changes
 - Increase BitWriter.write_bits limit up to 32 bits.

src/compiler/linker.c

@@ -308,6 +308,13 @@ static const char *find_arch_glob_path(const char *glob_path, int file_len)
 static const char *find_linux_crt(void)
 {
 	if (compiler.build.linuxpaths.crt) return compiler.build.linuxpaths.crt;
+	const char *arch_linux_crt1_path = "/usr/lib/crt1.o";
+	if (file_exists(arch_linux_crt1_path))
+	{
+		const char *arch_linux_path = "/usr/lib";
+		INFO_LOG("Found crt at %s", arch_linux_path);
+		return arch_linux_path;
+	}
 	const char *path = find_arch_glob_path("/usr/lib/*/crt1.o", 6);
 	if (!path)
 	{