[PATCH] [RFC] Compiler-RT on ARM via CMake

[Renato Golin]

Hi samsonov, asl,

First attempt to compile the RT library on ARM via CMake.

The current changes builds:
  lib/clang/3.5/lib/linux/libclang_rt.arm.a
  lib/clang/3.5/lib/linux/libclang_rt.san-arm.a

The UBSan tests are looking for:
  lib/clang/3.5/lib/linux/libclang_rt.san-armv7l.a
  lib/clang/3.5/lib/linux/libclang_rt.ubsan-armv7l.a
  lib/clang/3.5/lib/linux/libclang_rt.ubsan_cxx-armv7l.a

So, not only it's looking for the wrong arch name (the libs should work on all ARM, so I don't think we should name it armv7), but it's also looking for the UBSan libraries, which weren't compiled. I'm not sure why not...

http://llvm-reviews.chandlerc.com/D2604

Files:
  CMakeLists.txt
  lib/CMakeLists.txt
  lib/dfsan/lit_tests/lit.cfg
  lib/ubsan/lit_tests/lit.common.cfg

Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -98,6 +98,8 @@
   test_target_arch(i386 ${TARGET_32_BIT_CFLAGS})
 elseif("${LLVM_NATIVE_ARCH}" STREQUAL "PowerPC")
   test_target_arch(powerpc64 ${TARGET_64_BIT_CFLAGS})
+elseif("${LLVM_NATIVE_ARCH}" STREQUAL "ARM")
+  test_target_arch(arm "")
 endif()
 
 # We only support running instrumented tests when we're not cross compiling
@@ -210,7 +212,7 @@
 # Architectures supported by Sanitizer runtimes. Specific sanitizers may
 # support only subset of these (e.g. TSan works on x86_64 only).
 filter_available_targets(SANITIZER_COMMON_SUPPORTED_ARCH
-  x86_64 i386 powerpc64)
+  x86_64 i386 powerpc64 arm)
 
 add_subdirectory(include)
 
Index: lib/CMakeLists.txt
===================================================================
--- lib/CMakeLists.txt
+++ lib/CMakeLists.txt
@@ -195,8 +195,72 @@
   i386/umoddi3.S
   ${GENERIC_SOURCES})
 
+set(arm_SOURCES
+  arm/adddf3vfp.S
+  arm/extendsfdf2vfp.S
+  arm/nedf2vfp.S
+  arm/addsf3vfp.S
+  arm/fixdfsivfp.S
+  arm/negdf2vfp.S
+  arm/aeabi_dcmp.S
+  arm/fixsfsivfp.S
+  arm/negsf2vfp.S
+  arm/aeabi_fcmp.S
+  arm/fixunsdfsivfp.S
+  arm/nesf2vfp.S
+  arm/aeabi_idivmod.S
+  arm/fixunssfsivfp.S
+  arm/restore_vfp_d8_d15_regs.S
+  arm/aeabi_ldivmod.S
+  arm/floatsidfvfp.S
+  arm/save_vfp_d8_d15_regs.S
+  arm/aeabi_memcmp.S
+  arm/floatsisfvfp.S
+  arm/aeabi_memcpy.S
+  arm/floatunssidfvfp.S
+  arm/subdf3vfp.S
+  arm/aeabi_memmove.S
+  arm/floatunssisfvfp.S
+  arm/subsf3vfp.S
+  arm/aeabi_memset.S
+  arm/gedf2vfp.S
+  arm/switch16.S
+  arm/aeabi_uidivmod.S
+  arm/gesf2vfp.S
+  arm/switch32.S
+  arm/aeabi_uldivmod.S
+  arm/gtdf2vfp.S
+  arm/switch8.S
+  arm/bswapdi2.S
+  arm/gtsf2vfp.S
+  arm/switchu8.S
+  arm/bswapsi2.S
+  arm/ledf2vfp.S
+  arm/sync_synchronize.S
+  arm/comparesf2.S
+  arm/lesf2vfp.S
+  arm/truncdfsf2vfp.S
+  arm/divdf3vfp.S
+  arm/ltdf2vfp.S
+  arm/udivmodsi4.S
+  arm/divmodsi4.S
+  arm/ltsf2vfp.S
+  arm/udivsi3.S
+  arm/divsf3vfp.S
+  arm/Makefile.mk
+  arm/umodsi3.S
+  arm/divsi3.S
+  arm/modsi3.S
+  arm/unorddf2vfp.S
+  arm/eqdf2vfp.S
+  arm/muldf3vfp.S
+  arm/unordsf2vfp.S
+  arm/eqsf2vfp.S
+  arm/mulsf3vfp.S
+  ${GENERIC_SOURCES})
+
 if (NOT WIN32)
-  foreach(arch x86_64 i386)
+  foreach(arch x86_64 i386 arm)
     if(CAN_TARGET_${arch})
       add_compiler_rt_static_runtime(clang_rt.${arch} ${arch}
         SOURCES ${${arch}_SOURCES}
Index: lib/dfsan/lit_tests/lit.cfg
===================================================================
--- lib/dfsan/lit_tests/lit.cfg
+++ lib/dfsan/lit_tests/lit.cfg
@@ -67,3 +67,11 @@
 # DataFlowSanitizer tests are currently supported on Linux only.
 if config.host_os not in ['Linux']:
   config.unsupported = True
+
+# We're building the sanitizers on ARM, but the tests are looking for the
+# wrong name of static objects, disable for now
+if 'armv4' in config.root.target_triple or \
+   'armv5' in config.root.target_triple or \
+   'armv6' in config.root.target_triple or \
+   'armv7' in config.root.target_triple:
+    config.unsupported = True
Index: lib/ubsan/lit_tests/lit.common.cfg
===================================================================
--- lib/ubsan/lit_tests/lit.common.cfg
+++ lib/ubsan/lit_tests/lit.common.cfg
@@ -28,4 +28,12 @@
 if config.host_os not in ['Linux', 'Darwin']:
   config.unsupported = True
 
+# We're building the sanitizers on ARM, but the tests are looking for the
+# wrong name of static objects, disable for now
+if 'armv4' in config.root.target_triple or \
+   'armv5' in config.root.target_triple or \
+   'armv6' in config.root.target_triple or \
+   'armv7' in config.root.target_triple:
+    config.unsupported = True
+
 config.pipefail = False
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