build: Compile with -fdata-sections and -ffunction-sections

Author: mintsuki

meson.build

@@ -77,6 +77,10 @@ if not headers_only
 	add_project_arguments('-fno-rtti', '-fno-exceptions', language: 'cpp')
 	add_project_link_arguments('-nostdlib', language: ['c', 'cpp'])
 
+	if library_type == 'static'
+		add_project_arguments('-fdata-sections', '-ffunction-sections', language: ['c', 'cpp'])
+	endif
+
 	if get_option('buildtype').startswith('debug')
 		add_project_arguments('-D__MLIBC_DEBUG', language : ['c', 'cpp'])
 	endif

tests/meson.build

@@ -154,7 +154,7 @@ extra_cflags_test_cases = {
 
 test_sources = []
 test_objects = []
-test_link_args = []
+test_link_args = ['-Wl,--gc-sections']
 test_c_args = ['-D_GNU_SOURCE', '-U__MLIBC_DEBUG', '-U__MLIBC_BUILDING_MLIBC', '-fhosted', '-fno-builtin']
 use_pie = false