1AC_DEFUN([AX_DETECT_CLANG], [ 2AC_SUBST(CLANG_CXXFLAGS) 3AC_SUBST(CLANG_LDFLAGS) 4AC_SUBST(CLANG_RFLAG) 5AC_SUBST(CLANG_LIBS) 6AC_PROG_GREP 7AC_PROG_SED 8if test "x$with_clang_prefix" != "x"; then 9 LLVM_CONFIG="$with_clang_prefix/bin/llvm-config" 10fi 11AC_PATH_PROG([LLVM_CONFIG], ["llvm-config"]) 12if test -z "$LLVM_CONFIG" || test ! -x "$LLVM_CONFIG"; then 13 AC_MSG_ERROR([llvm-config not found]) 14fi 15CLANG_CXXFLAGS=`$LLVM_CONFIG --cxxflags | \ 16 $SED -e 's/-Wcovered-switch-default//;s/-gsplit-dwarf//'` 17CLANG_LDFLAGS=`$LLVM_CONFIG --ldflags` 18# Construct a -R argument for libtool. 19# This is needed in case some of the clang libraries are shared libraries. 20CLANG_RFLAG=`echo "$CLANG_LDFLAGS" | $SED -e 's/-L/-R/g'` 21targets=`$LLVM_CONFIG --targets-built` 22components="$targets asmparser bitreader support mc" 23# Link in option and frontendopenmp components when available 24# since they may be used by the clang libraries. 25for c in option frontendopenmp; do 26 $LLVM_CONFIG --components | $GREP $c > /dev/null 2> /dev/null 27 if test $? -eq 0; then 28 components="$components $c" 29 fi 30done 31CLANG_LIBS=`$LLVM_CONFIG --libs $components` 32systemlibs=`$LLVM_CONFIG --system-libs 2> /dev/null | tail -1` 33if test $? -eq 0; then 34 CLANG_LIBS="$CLANG_LIBS $systemlibs" 35fi 36CLANG_PREFIX=`$LLVM_CONFIG --prefix` 37AC_DEFINE_UNQUOTED(CLANG_PREFIX, ["$CLANG_PREFIX"], [Clang installation prefix]) 38 39# If $CLANG_PREFIX/bin/clang cannot find the standard include files, 40# then see if setting sysroot to `xcode-select -p`/SDKs/MacOSX.sdk helps. 41# This may be required on some versions of OS X since they lack /usr/include. 42# If so, set CLANG_SYSROOT accordingly. 43SAVE_CC="$CC" 44CC="$CLANG_PREFIX/bin/clang" 45AC_MSG_CHECKING( 46 [whether $CLANG_PREFIX/bin/clang can find standard include files]) 47found_header=no 48AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[]])], 49 [found_header=yes]) 50AC_MSG_RESULT([$found_header]) 51if test "x$found_header" != "xyes"; then 52 AC_CHECK_PROG(XCODE_SELECT, xcode-select, xcode-select, []) 53 if test -z "$XCODE_SELECT"; then 54 AC_MSG_ERROR([Cannot find xcode-select]) 55 fi 56 sysroot=`$XCODE_SELECT -p`/SDKs/MacOSX.sdk 57 SAVE_CPPFLAGS="$CPPFLAGS" 58 CPPFLAGS="$CPPFLAGS -isysroot $sysroot" 59 AC_MSG_CHECKING( 60 [whether standard include files can be found with sysroot set]) 61 found_header=no 62 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[]])], 63 [found_header=yes]) 64 AC_MSG_RESULT([$found_header]) 65 CPPFLAGS="$SAVE_CPPFLAGS" 66 if test "x$found_header" != "xyes"; then 67 AC_MSG_ERROR([Cannot find standard include files]) 68 else 69 AC_DEFINE_UNQUOTED([CLANG_SYSROOT], ["$sysroot"], 70 [Define to sysroot if needed]) 71 fi 72fi 73CC="$SAVE_CC" 74 75AC_LANG_PUSH(C++) 76 77SAVE_CPPFLAGS="$CPPFLAGS" 78CPPFLAGS="$CLANG_CXXFLAGS $CPPFLAGS" 79AC_CHECK_HEADER([clang/Basic/SourceLocation.h], [], 80 [AC_ERROR([clang header file not found])]) 81AC_EGREP_HEADER([getDefaultTargetTriple], [llvm/Support/Host.h], [], 82 [AC_DEFINE([getDefaultTargetTriple], [getHostTriple], 83 [Define to getHostTriple for older versions of clang])]) 84AC_EGREP_HEADER([getExpansionLineNumber], [clang/Basic/SourceLocation.h], [], 85 [AC_DEFINE([getExpansionLineNumber], [getInstantiationLineNumber], 86 [Define to getInstantiationLineNumber for older versions of clang])]) 87AC_EGREP_HEADER([getImmediateExpansionRange], [clang/Basic/SourceManager.h], 88 [], 89 [AC_DEFINE([getImmediateExpansionRange], 90 [getImmediateInstantiationRange], 91 [Define to getImmediateInstantiationRange for older versions of clang])] 92) 93AC_EGREP_HEADER([DiagnosticsEngine], [clang/Basic/Diagnostic.h], [], 94 [AC_DEFINE([DiagnosticsEngine], [Diagnostic], 95 [Define to Diagnostic for older versions of clang])]) 96AC_EGREP_HEADER([ArrayRef], [clang/Driver/Driver.h], 97 [AC_DEFINE([USE_ARRAYREF], [], 98 [Define if Driver::BuildCompilation takes ArrayRef]) 99 AC_EGREP_HEADER([ArrayRef.*CommandLineArgs], 100 [clang/Frontend/CompilerInvocation.h], 101 [AC_DEFINE([CREATE_FROM_ARGS_TAKES_ARRAYREF], [], 102 [Define if CompilerInvocation::CreateFromArgs takes 103 ArrayRef]) 104 ]) 105 ]) 106AC_EGREP_HEADER([CXXIsProduction], [clang/Driver/Driver.h], 107 [AC_DEFINE([HAVE_CXXISPRODUCTION], [], 108 [Define if Driver constructor takes CXXIsProduction argument])]) 109AC_EGREP_HEADER([ IsProduction], [clang/Driver/Driver.h], 110 [AC_DEFINE([HAVE_ISPRODUCTION], [], 111 [Define if Driver constructor takes IsProduction argument])]) 112AC_TRY_COMPILE([#include <clang/Driver/Driver.h>], [ 113 using namespace clang; 114 DiagnosticsEngine *Diags; 115 new driver::Driver("", "", "", *Diags); 116], [AC_DEFINE([DRIVER_CTOR_TAKES_DEFAULTIMAGENAME], [], 117 [Define if Driver constructor takes default image name])]) 118AC_EGREP_HEADER([void HandleTopLevelDecl\(], [clang/AST/ASTConsumer.h], 119 [AC_DEFINE([HandleTopLevelDeclReturn], [void], 120 [Return type of HandleTopLevelDeclReturn]) 121 AC_DEFINE([HandleTopLevelDeclContinue], [], 122 [Return type of HandleTopLevelDeclReturn])], 123 [AC_DEFINE([HandleTopLevelDeclReturn], [bool], 124 [Return type of HandleTopLevelDeclReturn]) 125 AC_DEFINE([HandleTopLevelDeclContinue], [true], 126 [Return type of HandleTopLevelDeclReturn])]) 127AC_CHECK_HEADER([clang/Basic/DiagnosticOptions.h], 128 [AC_DEFINE([HAVE_BASIC_DIAGNOSTICOPTIONS_H], [], 129 [Define if clang/Basic/DiagnosticOptions.h exists])]) 130AC_CHECK_HEADER([clang/Lex/PreprocessorOptions.h], 131 [AC_DEFINE([HAVE_LEX_PREPROCESSOROPTIONS_H], [], 132 [Define if clang/Lex/PreprocessorOptions.h exists])], [], 133 [#include <clang/Basic/LLVM.h>]) 134AC_TRY_COMPILE([#include <clang/Basic/TargetInfo.h>], [ 135 using namespace clang; 136 std::shared_ptr<TargetOptions> TO; 137 DiagnosticsEngine *Diags; 138 TargetInfo::CreateTargetInfo(*Diags, TO); 139], [AC_DEFINE([CREATETARGETINFO_TAKES_SHARED_PTR], [], 140 [Define if TargetInfo::CreateTargetInfo takes shared_ptr])]) 141AC_TRY_COMPILE([#include <clang/Basic/TargetInfo.h>], [ 142 using namespace clang; 143 TargetOptions *TO; 144 DiagnosticsEngine *Diags; 145 TargetInfo::CreateTargetInfo(*Diags, TO); 146], [AC_DEFINE([CREATETARGETINFO_TAKES_POINTER], [], 147 [Define if TargetInfo::CreateTargetInfo takes pointer])]) 148AC_TRY_COMPILE([#include <clang/Frontend/CompilerInstance.h>], [ 149 using namespace clang; 150 DiagnosticConsumer *client; 151 CompilerInstance *Clang; 152 Clang->createDiagnostics(client); 153], [], [AC_DEFINE([CREATEDIAGNOSTICS_TAKES_ARG], [], 154 [Define if CompilerInstance::createDiagnostics takes argc and argv])]) 155AC_TRY_COMPILE([#include <clang/Lex/HeaderSearchOptions.h>], [ 156 using namespace clang; 157 HeaderSearchOptions HSO; 158 HSO.AddPath("", frontend::Angled, false, false); 159], [AC_DEFINE([ADDPATH_TAKES_4_ARGUMENTS], [], 160 [Define if HeaderSearchOptions::AddPath takes 4 arguments])]) 161AC_EGREP_HEADER([getNumParams], 162 [clang/AST/CanonicalType.h], 163 [AC_DEFINE([getNumArgs], [getNumParams], 164 [Define to getNumParams for newer versions of clang]) 165 AC_DEFINE([getArgType], [getParamType], 166 [Define to getParamType for newer versions of clang])]) 167AC_EGREP_HEADER([getReturnType], 168 [clang/AST/CanonicalType.h], [], 169 [AC_DEFINE([getReturnType], [getResultType], 170 [Define to getResultType for older versions of clang])]) 171AC_TRY_COMPILE([#include <clang/Frontend/CompilerInstance.h>], [ 172 using namespace clang; 173 CompilerInstance *Clang; 174 Clang->createPreprocessor(TU_Complete); 175], [AC_DEFINE([CREATEPREPROCESSOR_TAKES_TUKIND], [], 176[Define if CompilerInstance::createPreprocessor takes TranslationUnitKind])]) 177AC_EGREP_HEADER([setMainFileID], [clang/Basic/SourceManager.h], 178 [AC_DEFINE([HAVE_SETMAINFILEID], [], 179 [Define if SourceManager has a setMainFileID method])]) 180AC_CHECK_HEADER([llvm/ADT/OwningPtr.h], 181 [AC_DEFINE([HAVE_ADT_OWNINGPTR_H], [], 182 [Define if llvm/ADT/OwningPtr.h exists])]) 183AC_EGREP_HEADER([initializeBuiltins], 184 [clang/Basic/Builtins.h], [], 185 [AC_DEFINE([initializeBuiltins], [InitializeBuiltins], 186 [Define to InitializeBuiltins for older versions of clang])]) 187AC_EGREP_HEADER([IK_C], [clang/Frontend/FrontendOptions.h], [], 188 [AC_CHECK_HEADER([clang/Basic/LangStandard.h], 189 [IK_C=Language::C], [IK_C=InputKind::C]) 190 AC_DEFINE_UNQUOTED([IK_C], [$IK_C], 191 [Define to Language::C or InputKind::C for newer versions of clang]) 192 ]) 193AC_TRY_COMPILE([ 194 #include <clang/Basic/TargetOptions.h> 195 #include <clang/Lex/PreprocessorOptions.h> 196 #include <clang/Frontend/CompilerInstance.h> 197], [ 198 using namespace clang; 199 CompilerInstance *Clang; 200 TargetOptions TO; 201 llvm::Triple T(TO.Triple); 202 PreprocessorOptions PO; 203 CompilerInvocation::setLangDefaults(Clang->getLangOpts(), IK_C, 204 T, PO, LangStandard::lang_unspecified); 205], [AC_DEFINE([SETLANGDEFAULTS_TAKES_5_ARGUMENTS], [], 206 [Define if CompilerInvocation::setLangDefaults takes 5 arguments])]) 207AC_TRY_COMPILE([ 208 #include <clang/Frontend/CompilerInstance.h> 209 #include <clang/Frontend/CompilerInvocation.h> 210], [ 211 using namespace clang; 212 CompilerInvocation *invocation; 213 CompilerInstance *Clang; 214 Clang->setInvocation(std::make_shared<CompilerInvocation>(*invocation)); 215], [AC_DEFINE([SETINVOCATION_TAKES_SHARED_PTR], [], 216 [Defined if CompilerInstance::setInvocation takes a shared_ptr])]) 217AC_CHECK_HEADER([llvm/Option/Arg.h], 218 [AC_DEFINE([HAVE_LLVM_OPTION_ARG_H], [], 219 [Define if llvm/Option/Arg.h exists])]) 220CPPFLAGS="$SAVE_CPPFLAGS" 221 222SAVE_LDFLAGS="$LDFLAGS" 223LDFLAGS="$CLANG_LDFLAGS $LDFLAGS" 224 225# Use single libclang-cpp shared library when available. 226# Otherwise, use a selection of clang libraries that appears to work. 227AC_CHECK_LIB([clang-cpp], [main], [have_lib_clang=yes], [have_lib_clang=no]) 228if test "$have_lib_clang" = yes; then 229 CLANG_LIBS="-lclang-cpp $CLANG_LIBS" 230else 231 CLANG_LIBS="-lclangBasic -lclangDriver $CLANG_LIBS" 232 CLANG_LIBS="-lclangAnalysis -lclangAST -lclangLex $CLANG_LIBS" 233 LDFLAGS="$CLANG_LDFLAGS $CLANG_LIBS $SAVE_LDFLAGS" 234 AC_CHECK_LIB([clangEdit], [main], [LIB_CLANG_EDIT=-lclangEdit], []) 235 CLANG_LIBS="$LIB_CLANG_EDIT $CLANG_LIBS" 236 CLANG_LIBS="-lclangParse -lclangSema $CLANG_LIBS" 237 CLANG_LIBS="-lclangFrontend -lclangSerialization $CLANG_LIBS" 238fi 239 240LDFLAGS="$SAVE_LDFLAGS" 241 242AC_LANG_POP 243]) 244