gcc -g -O0 -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -D_FORTIFY_SOURCE=2 -c test-d.c
gcc -Wl,-z,relro -o test test-a.o test-b.o test-c.o -ltest
+# -D_FORTIFY_SOURCE=2 requires -O2 to work, therfore ignore it for debug
+# lines.
+gcc -g -O0 -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -c test-a.c
+gcc -g -O0 -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -c test-b.c
+gcc -g -O0 -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -c test-c.c
+gcc -g -O0 -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -c test-d.c
+gcc -Wl,-z,relro -o test test-a.o test-b.o test-c.o -ltest
+
gcc -g -Og -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -D_FORTIFY_SOURCE=2 -c test-a.c
gcc -g -Og -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -D_FORTIFY_SOURCE=2 -c test-b.c
gcc -g -Og -fstack-protector-strong -Wformat -Wformat-security -Werror=format-security -D_FORTIFY_SOURCE=2 -c test-c.c