Enable `-no-pie` only if the compiler supports it

A previous commit introduced `-no-pie` to disable PIE in GCC versions
higher than 5.2. However, earlier versions don't support such an option.
This commit introduces the necessary detection mechanism to enable it or
not.

CMakeLists.txt

@@ -71,6 +71,11 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
 add_definitions("-D_FILE_OFFSET_BITS=64")
 include_directories(argparse/)
 
+CHECK_CXX_COMPILER_FLAG("-no-pie" COMPILER_SUPPORTS_NO_PIE)
+if(COMPILER_SUPPORTS_NO_PIE)
+  set(NO_PIE "${TEST_CFLAGS} -no-pie")
+endif()
+
 set(CMAKE_INSTALL_RPATH "\$ORIGIN/../lib${LLVM_LIBDIR_SUFFIX}")
 
 add_executable(revamb ptcdump.cpp main.cpp debughelper.cpp variablemanager.cpp

tests/FindTools.cmake

@@ -12,7 +12,7 @@ find_program(DIFF diff)
 # * A cross compiler (provided by the user)
 # * libtinycode-${ARCH}.so, which must be in the search path
 
-set(SUPPORTED_ARCHITECTURES "aarch64;alpha;arm;armeb;cris;i386;m68k;microblaze;microblazeel;mips;mips64;mips64el;mipsel;mipsn32;mipsn32el;nbd;or32;ppc;ppc64;ppc64abi32;s390x;sh4;sh4eb;sparc;sparc32plus;sparc64;unicore32;x86_64")
+set(SUPPORTED_ARCHITECTURES "aarch64;alpha;arm;armeb;cris;m68k;microblaze;microblazeel;mips;mips64;mips64el;mipsel;mipsn32;mipsn32el;nbd;or32;ppc;ppc64;ppc64abi32;s390x;sh4;sh4eb;sparc;sparc32plus;sparc64;unicore32;x86_64")
 set(QEMU_BIN_PATH "${QEMU_INSTALL_PATH}/bin")
 set(QEMU_LIB_PATH "${QEMU_INSTALL_PATH}/lib")
 

tests/Runtime/RuntimeTests.cmake

@@ -5,7 +5,7 @@
 # Test definitions
 set(SRC ${CMAKE_SOURCE_DIR}/tests/Runtime)
 
-set(TEST_CFLAGS "-std=c99 -static -fno-pic -fno-pie -g")
+set(TEST_CFLAGS "-std=c99 -static -fno-pic -fno-pie ${NO_PIE} -g")
 set(TESTS "calc" "function_call" "floating_point" "syscall" "global")
 
 ## calc
@@ -89,7 +89,7 @@ foreach(ARCH ${SUPPORTED_ARCHITECTURES})
 
     # Compose the command line to link support.c and the translated binaries
     string(REPLACE "-" "_" NORMALIZED_ARCH "${ARCH}")
-    compile_executable("$(${CMAKE_BINARY_DIR}/li-csv-to-ld-options ${BINARY}.ll.li.csv) ${BINARY}${CMAKE_C_OUTPUT_EXTENSION} ${CMAKE_BINARY_DIR}/support.c -DTARGET_${NORMALIZED_ARCH} -lz -lm -lrt -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast -g -fno-pie -no-pie"
+    compile_executable("$(${CMAKE_BINARY_DIR}/li-csv-to-ld-options ${BINARY}.ll.li.csv) ${BINARY}${CMAKE_C_OUTPUT_EXTENSION} ${CMAKE_BINARY_DIR}/support.c -DTARGET_${NORMALIZED_ARCH} -lz -lm -lrt -Wno-pointer-to-int-cast -Wno-int-to-pointer-cast -g -fno-pie ${NO_PIE}"
       "${BINARY}.translated"
       COMPILE_TRANSLATED)
 

translate

@@ -126,8 +126,14 @@ elif [ "$OPTIMIZE" -eq 2 ]; then
     "$LLC" -O2 -filetype=obj "$LL_OPT" -o "$OBJ" -regalloc=fast -disable-machine-licm
 fi
 
+if "$CC" -no-pie |& grep 'unrecognized command line option'; then
+    DISABLE_PIE="-fno-pie"
+else
+    DISABLE_PIE="-fno-pie -no-pie"
+fi
+
 "$CC" $("$TOOPT" "$CSV") \
       "$OBJ" \
       -lz -lm -lrt \
       -o "$OUTPUT" \
-      -fno-pie -no-pie
+      $DISABLE_PIE