Restore clang_rt library name on i686-android.

Summary:
Recent changes canonicalized clang_rt library names to refer to
"i386" on all x86 targets. Android historically uses i686.

This change adds a special case to keep i686 in all clang_rt
libraries when targeting Android.

Reviewers: hans, mgorny, beanz

Subscribers: srhines, cfe-commits, llvm-commits

Differential Revision: https://reviews.llvm.org/D37278

llvm-svn: 312048

Author: eugenis

clang/lib/Driver/ToolChain.cpp

@@ -305,6 +305,10 @@ static StringRef getArchNameForCompilerRTLib(const ToolChain &TC,
                ? "armhf"
                : "arm";
 
+  // For historic reasons, Android library is using i686 instead of i386.
+  if (TC.getArch() == llvm::Triple::x86 && Triple.isAndroid())
+    return "i686";
+
   return llvm::Triple::getArchTypeName(TC.getArch());
 }
 

clang/test/Driver/sanitizer-ld.c

@@ -133,6 +133,18 @@
 // CHECK-ASAN-ANDROID-NOT: "-lpthread"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target i686-linux-android -fuse-ld=ld -fsanitize=address \
+// RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
+// RUN:   | FileCheck --check-prefix=CHECK-ASAN-ANDROID-X86 %s
+//
+// CHECK-ASAN-ANDROID-X86: "{{(.*[^.0-9A-Z_a-z])?}}ld{{(.exe)?}}"
+// CHECK-ASAN-ANDROID-X86-NOT: "-lc"
+// CHECK-ASAN-ANDROID-X86: "-pie"
+// CHECK-ASAN-ANDROID-X86-NOT: "-lpthread"
+// CHECK-ASAN-ANDROID-X86: libclang_rt.asan-i686-android.so"
+// CHECK-ASAN-ANDROID-X86-NOT: "-lpthread"
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target arm-linux-androideabi -fsanitize=address \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
 // RUN:     -shared-libasan \

compiler-rt/cmake/Modules/AddCompilerRT.cmake

@@ -86,6 +86,14 @@ function(add_compiler_rt_component name)
   add_dependencies(compiler-rt ${name})
 endfunction()
 
+macro(set_output_name output name arch)
+  if(ANDROID AND ${arch} STREQUAL "i386")
+    set(${output} "${name}-i686${COMPILER_RT_OS_SUFFIX}")
+  else()
+    set(${output} "${name}-${arch}${COMPILER_RT_OS_SUFFIX}")
+  endif()
+endmacro()
+
 # Adds static or shared runtime for a list of architectures and operating
 # systems and puts it in the proper directory in the build and install trees.
 # add_compiler_rt_runtime(<name>
@@ -142,15 +150,15 @@ function(add_compiler_rt_runtime name type)
       endif()
       if(type STREQUAL "STATIC")
         set(libname "${name}-${arch}")
-        set(output_name_${libname} ${libname}${COMPILER_RT_OS_SUFFIX})
+        set_output_name(output_name_${libname} ${name} ${arch})
       else()
         set(libname "${name}-dynamic-${arch}")
         set(extra_cflags_${libname} ${TARGET_${arch}_CFLAGS} ${LIB_CFLAGS})
         set(extra_link_flags_${libname} ${TARGET_${arch}_LINK_FLAGS} ${LIB_LINK_FLAGS})
         if(WIN32)
-          set(output_name_${libname} ${name}_dynamic-${arch}${COMPILER_RT_OS_SUFFIX})
+          set_output_name(output_name_${libname} ${name}_dynamic ${arch})
         else()
-          set(output_name_${libname} ${name}-${arch}${COMPILER_RT_OS_SUFFIX})
+          set_output_name(output_name_${libname} ${name} ${arch})
         endif()
       endif()
       set(sources_${libname} ${LIB_SOURCES})