Don't force LTO, and don't force flags which we already handle in
the toolchain.
--- a/meson.build
+++ b/meson.build
@@ -31,9 +31,7 @@ project('leancrypto', 'c',
 cc = meson.get_compiler('c')
 
 # Hardening Compiler flags
-add_global_arguments([ '-fstack-protector-strong',
-		       '-fwrapv',
-		       '--param', 'ssp-buffer-size=4',
+add_global_arguments([ '-fwrapv',
 		       '-fvisibility=hidden',
 		       '-Wconversion',
 		       '-Wcast-align',
@@ -72,32 +70,6 @@ if cc.has_argument('-Wshorten-64-to-32')
 			     language: 'c')
 endif
 
-# x86_64 hardening
-if cc.has_argument('-fcf-protection=full')
-	add_global_arguments([ '-fcf-protection=full' ],
-			     language: 'c')
-endif
-
-# ARM64 hardening
-if cc.has_argument('-mbranch-protection=standard')
-	add_global_arguments([ '-mbranch-protection=standard' ], language: 'c')
-endif
-
-# MINGW64 cannot handle lto properly at the moment
-if (cc.has_argument('-flto') and
-    host_machine.system() != 'windows' and
-    get_option('efi').disabled())
-	add_global_arguments([ '-flto=auto' ], language: 'c')
-	add_project_link_arguments('-flto=auto', language : 'c')
-endif
-
-if (cc.has_argument('-ffat-lto-objects') and
-    host_machine.system() != 'windows' and
-    host_machine.system() != 'darwin' and
-    get_option('efi').disabled())
-	add_global_arguments([ '-ffat-lto-objects' ], language: 'c')
-endif
-
 if build_machine.system() == 'sunos'
 	add_global_arguments([ '-Wa,--divide' ], language: 'c')
 endif
@@ -105,8 +77,6 @@ endif
 if get_option('optimization') == '0'
 	add_global_arguments([ '-DDEBUG' ], language: 'c')
 elif get_option('efi').disabled()
-	add_global_arguments([ '-U_FORTIFY_SOURCE' ], language: 'c')
-	add_global_arguments([ '-D_FORTIFY_SOURCE=3' ], language: 'c')
 endif
 
 if get_option('enable_selftests').enabled()