1 AC_DEFUN([AX_DETECT_CLANG], [ 2 AC_SUBST(CLANG_CXXFLAGS) 3 AC_SUBST(CLANG_LDFLAGS) 4 AC_SUBST(CLANG_RFLAG) 5 AC_SUBST(CLANG_LIBS) 6 AC_PROG_GREP 7 AC_PROG_SED 8 if test "x$with_clang_prefix" != "x"; then 9 LLVM_CONFIG="$with_clang_prefix/bin/llvm-config" 10 fi 11 AC_PATH_PROG([LLVM_CONFIG], ["llvm-config"]) 12 if test -z "$LLVM_CONFIG" || test ! -x "$LLVM_CONFIG"; then 13 AC_MSG_ERROR([llvm-config not found]) 14 fi 15 CLANG_CXXFLAGS=`$LLVM_CONFIG --cxxflags | \ 16 $SED -e 's/-Wcovered-switch-default//;s/-gsplit-dwarf//'` 17 CLANG_LDFLAGS=`$LLVM_CONFIG --ldflags` 18 # Construct a -R argument for libtool. 19 # This is needed in case some of the clang libraries are shared libraries. 20 CLANG_RFLAG=`echo "$CLANG_LDFLAGS" | $SED -e 's/-L/-R/g'` 21 targets=`$LLVM_CONFIG --targets-built` 22 components="$targets asmparser bitreader support mc" 23 # Link in option and frontendopenmp components when available 24 # since they may be used by the clang libraries. 25 for 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 $c" 29 fi 30 done 31 CLANG_LIBS=`$LLVM_CONFIG --libs $components` 32 systemlibs=`$LLVM_CONFIG --system-libs 2> /dev/null | tail -1` 33 if test $? -eq 0; then 34 CLANG_LIBS="$CLANG_LIBS $systemlibs" 35 fi 36 CLANG_PREFIX=`$LLVM_CONFIG --prefix` 37 AC_DEFINE_UNQUOTED(CLANG_PREFIX, ["$CLANG_PREFIX"], [Clang installation prefix]) 38 39 # If $CLANG_PREFIX/bin/clang cannot find the standard include files, 40 # then see if setting sysroot to `xcode-select -p`/SDKs/MacOSX.sdk helps. 41 # This may be required on some versions of OS X since they lack /usr/include. 42 # If so, set CLANG_SYSROOT accordingly. 43 SAVE_CC="$CC" 44 CC="$CLANG_PREFIX/bin/clang" 45 AC_MSG_CHECKING( 46 [whether $CLANG_PREFIX/bin/clang can find standard include files]) 47 found_header=no 48 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[]])], 49 [found_header=yes]) 50 AC_MSG_RESULT([$found_header]) 51 if 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], ["$sysroot"], 70 [Define to sysroot if needed]) 71 fi 72 fi 73 CC="$SAVE_CC" 74 75 AC_LANG_PUSH(C++) 76 77 SAVE_CPPFLAGS="$CPPFLAGS" 78 SAVE_LDFLAGS="$LDFLAGS" 79 SAVE_LIBS="$LIBS" 80 81 CPPFLAGS="$CLANG_CXXFLAGS -I$srcdir $CPPFLAGS" 82 AC_CHECK_HEADER([clang/Basic/SourceLocation.h], [], 83 [AC_MSG_ERROR([clang header file not found])]) 84 AC_CHECK_HEADER([llvm/TargetParser/Host.h], 85 [AC_DEFINE([HAVE_TARGETPARSER_HOST_H], [], 86 [Define if llvm/TargetParser/Host.h exists])], 87 [AC_EGREP_HEADER([getDefaultTargetTriple], [llvm/Support/Host.h], [], 88 [AC_DEFINE([getDefaultTargetTriple], [getHostTriple], 89 [Define to getHostTriple for older versions of clang])]) 90 ]) 91 AC_EGREP_HEADER([getExpansionLineNumber], [clang/Basic/SourceLocation.h], [], 92 [AC_DEFINE([getExpansionLineNumber], [getInstantiationLineNumber], 93 [Define to getInstantiationLineNumber for older versions of clang])]) 94 AC_EGREP_HEADER([getImmediateExpansionRange], [clang/Basic/SourceManager.h], 95 [], 96 [AC_DEFINE([getImmediateExpansionRange], 97 [getImmediateInstantiationRange], 98 [Define to getImmediateInstantiationRange for older versions of clang])] 99 ) 100 AC_EGREP_HEADER([DiagnosticsEngine], [clang/Basic/Diagnostic.h], [], 101 [AC_DEFINE([DiagnosticsEngine], [Diagnostic], 102 [Define to Diagnostic for older versions of clang])]) 103 AC_EGREP_HEADER([ArrayRef], [clang/Driver/Driver.h], 104 [AC_DEFINE([USE_ARRAYREF], [], 105 [Define if Driver::BuildCompilation takes ArrayRef]) 106 AC_EGREP_HEADER([ArrayRef.*CommandLineArgs], 107 [clang/Frontend/CompilerInvocation.h], 108 [AC_DEFINE([CREATE_FROM_ARGS_TAKES_ARRAYREF], [], 109 [Define if CompilerInvocation::CreateFromArgs takes 110 ArrayRef]) 111 ]) 112 ]) 113 AC_EGREP_HEADER([CXXIsProduction], [clang/Driver/Driver.h], 114 [AC_DEFINE([HAVE_CXXISPRODUCTION], [], 115 [Define if Driver constructor takes CXXIsProduction argument])]) 116 AC_EGREP_HEADER([ IsProduction], [clang/Driver/Driver.h], 117 [AC_DEFINE([HAVE_ISPRODUCTION], [], 118 [Define if Driver constructor takes IsProduction argument])]) 119 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <clang/Driver/Driver.h>]], [[ 120 using namespace clang; 121 DiagnosticsEngine *Diags; 122 new driver::Driver("", "", "", *Diags); 123 ]])], [AC_DEFINE([DRIVER_CTOR_TAKES_DEFAULTIMAGENAME], [], 124 [Define if Driver constructor takes default image name])]) 125 AC_EGREP_HEADER([void HandleTopLevelDecl\(], [clang/AST/ASTConsumer.h], 126 [AC_DEFINE([HandleTopLevelDeclReturn], [void], 127 [Return type of HandleTopLevelDeclReturn]) 128 AC_DEFINE([HandleTopLevelDeclContinue], [], 129 [Return type of HandleTopLevelDeclReturn])], 130 [AC_DEFINE([HandleTopLevelDeclReturn], [bool], 131 [Return type of HandleTopLevelDeclReturn]) 132 AC_DEFINE([HandleTopLevelDeclContinue], [true], 133 [Return type of HandleTopLevelDeclReturn])]) 134 AC_CHECK_HEADER([clang/Basic/DiagnosticOptions.h], 135 [AC_DEFINE([HAVE_BASIC_DIAGNOSTICOPTIONS_H], [], 136 [Define if clang/Basic/DiagnosticOptions.h exists])]) 137 AC_CHECK_HEADER([clang/Lex/PreprocessorOptions.h], 138 [AC_DEFINE([HAVE_LEX_PREPROCESSOROPTIONS_H], [], 139 [Define if clang/Lex/PreprocessorOptions.h exists])], [], 140 [#include <clang/Basic/LLVM.h>]) 141 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <clang/Basic/TargetInfo.h>]], [[ 142 using namespace clang; 143 std::shared_ptr<TargetOptions> TO; 144 DiagnosticsEngine *Diags; 145 TargetInfo::CreateTargetInfo(*Diags, TO); 146 ]])], [AC_DEFINE([CREATETARGETINFO_TAKES_SHARED_PTR], [], 147 [Define if TargetInfo::CreateTargetInfo takes shared_ptr])]) 148 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <clang/Basic/TargetInfo.h>]], [[ 149 using namespace clang; 150 TargetOptions *TO; 151 DiagnosticsEngine *Diags; 152 TargetInfo::CreateTargetInfo(*Diags, TO); 153 ]])], [AC_DEFINE([CREATETARGETINFO_TAKES_POINTER], [], 154 [Define if TargetInfo::CreateTargetInfo takes pointer])]) 155 AC_COMPILE_IFELSE([AC_LANG_PROGRAM( 156 [[#include <clang/Frontend/CompilerInstance.h>]], [[ 157 using namespace clang; 158 DiagnosticConsumer *client; 159 CompilerInstance *Clang; 160 Clang->createDiagnostics(client); 161 ]])], [], [AC_DEFINE([CREATEDIAGNOSTICS_TAKES_ARG], [], 162 [Define if CompilerInstance::createDiagnostics takes argc and argv])]) 163 AC_COMPILE_IFELSE([AC_LANG_PROGRAM( 164 [[#include <clang/Lex/HeaderSearchOptions.h>]], [[ 165 using namespace clang; 166 HeaderSearchOptions HSO; 167 HSO.AddPath("", frontend::Angled, false, false); 168 ]])], [AC_DEFINE([ADDPATH_TAKES_4_ARGUMENTS], [], 169 [Define if HeaderSearchOptions::AddPath takes 4 arguments])]) 170 AC_EGREP_HEADER([getNumParams], 171 [clang/AST/CanonicalType.h], 172 [AC_DEFINE([getNumArgs], [getNumParams], 173 [Define to getNumParams for newer versions of clang]) 174 AC_DEFINE([getArgType], [getParamType], 175 [Define to getParamType for newer versions of clang])]) 176 AC_EGREP_HEADER([getReturnType], 177 [clang/AST/CanonicalType.h], [], 178 [AC_DEFINE([getReturnType], [getResultType], 179 [Define to getResultType for older versions of clang])]) 180 AC_COMPILE_IFELSE([AC_LANG_PROGRAM( 181 [[#include <clang/Frontend/CompilerInstance.h>]], [[ 182 using namespace clang; 183 CompilerInstance *Clang; 184 Clang->createPreprocessor(TU_Complete); 185 ]])], [AC_DEFINE([CREATEPREPROCESSOR_TAKES_TUKIND], [], 186 [Define if CompilerInstance::createPreprocessor takes TranslationUnitKind])]) 187 AC_EGREP_HEADER([setMainFileID], [clang/Basic/SourceManager.h], 188 [AC_DEFINE([HAVE_SETMAINFILEID], [], 189 [Define if SourceManager has a setMainFileID method])]) 190 AC_CHECK_HEADER([llvm/ADT/OwningPtr.h], 191 [AC_DEFINE([HAVE_ADT_OWNINGPTR_H], [], 192 [Define if llvm/ADT/OwningPtr.h exists])]) 193 AC_EGREP_HEADER([initializeBuiltins], 194 [clang/Basic/Builtins.h], [], 195 [AC_DEFINE([initializeBuiltins], [InitializeBuiltins], 196 [Define to InitializeBuiltins for older versions of clang])]) 197 AC_EGREP_HEADER([IK_C], [clang/Frontend/FrontendOptions.h], [], 198 [AC_CHECK_HEADER([clang/Basic/LangStandard.h], 199 [IK_C=Language::C], [IK_C=InputKind::C]) 200 AC_DEFINE_UNQUOTED([IK_C], [$IK_C], 201 [Define to Language::C or InputKind::C for newer versions of clang]) 202 ]) 203 # llvmorg-15-init-7544-g93471e65df48 204 AC_EGREP_HEADER([setLangDefaults], [clang/Basic/LangOptions.h], 205 [SETLANGDEFAULTS=LangOptions], 206 [SETLANGDEFAULTS=CompilerInvocation]) 207 AC_DEFINE_UNQUOTED([SETLANGDEFAULTS], [$SETLANGDEFAULTS], 208 [Define to class with setLangDefaults method]) 209 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 210 #include <clang/Basic/TargetOptions.h> 211 #include <clang/Lex/PreprocessorOptions.h> 212 #include <clang/Frontend/CompilerInstance.h> 213 214 #include "set_lang_defaults_arg4.h" 215 ]], [[ 216 using namespace clang; 217 CompilerInstance *Clang; 218 TargetOptions TO; 219 llvm::Triple T(TO.Triple); 220 PreprocessorOptions PO; 221 SETLANGDEFAULTS::setLangDefaults(Clang->getLangOpts(), IK_C, 222 T, setLangDefaultsArg4(PO), 223 LangStandard::lang_unspecified); 224 ]])], [AC_DEFINE([SETLANGDEFAULTS_TAKES_5_ARGUMENTS], [], 225 [Define if CompilerInvocation::setLangDefaults takes 5 arguments])]) 226 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 227 #include <clang/Frontend/CompilerInstance.h> 228 #include <clang/Frontend/CompilerInvocation.h> 229 ]], [[ 230 using namespace clang; 231 CompilerInvocation *invocation; 232 CompilerInstance *Clang; 233 Clang->setInvocation(std::make_shared<CompilerInvocation>(*invocation)); 234 ]])], [AC_DEFINE([SETINVOCATION_TAKES_SHARED_PTR], [], 235 [Defined if CompilerInstance::setInvocation takes a shared_ptr])]) 236 AC_CHECK_HEADER([llvm/Option/Arg.h], 237 [AC_DEFINE([HAVE_LLVM_OPTION_ARG_H], [], 238 [Define if llvm/Option/Arg.h exists])]) 239 240 LDFLAGS="$CLANG_LDFLAGS $LDFLAGS" 241 242 # A test program for checking whether linking against libclang-cpp works. 243 m4_define([_AX_DETECT_CLANG_PROGRAM], [AC_LANG_PROGRAM( 244 [[#include <clang/Frontend/CompilerInstance.h>]], 245 [[ 246 new clang::CompilerInstance(); 247 ]])]) 248 249 # Use single libclang-cpp shared library when available. 250 # Otherwise, use a selection of clang libraries that appears to work. 251 AC_CHECK_LIB([clang-cpp], [main], [have_lib_clang=yes], [have_lib_clang=no]) 252 if test "$have_lib_clang" = yes; then 253 # The LLVM libraries may be linked into libclang-cpp already. 254 # Linking against them again can cause errors about options 255 # being registered more than once. 256 # Check whether linking against libclang-cpp requires 257 # linking against the LLVM libraries as well. 258 # Fail if linking fails with or without the LLVM libraries. 259 AC_MSG_CHECKING([whether libclang-cpp needs LLVM libraries]) 260 LIBS="-lclang-cpp $SAVE_LIBS" 261 AC_LINK_IFELSE([_AX_DETECT_CLANG_PROGRAM], [clangcpp_needs_llvm=no], [ 262 LIBS="-lclang-cpp $CLANG_LIBS $SAVE_LIBS" 263 AC_LINK_IFELSE([_AX_DETECT_CLANG_PROGRAM], 264 [clangcpp_needs_llvm=yes], 265 [clangcpp_needs_llvm=unknown]) 266 ]) 267 AC_MSG_RESULT([$clangcpp_needs_llvm]) 268 AS_IF([test "$clangcpp_needs_llvm" = "no"], 269 [CLANG_LIBS="-lclang-cpp"], 270 [test "$clangcpp_needs_llvm" = "yes"], 271 [CLANG_LIBS="-lclang-cpp $CLANG_LIBS"], 272 [AC_MSG_FAILURE([unable to link against libclang-cpp])]) 273 else 274 CLANG_LIBS="-lclangBasic -lclangDriver $CLANG_LIBS" 275 CLANG_LIBS="-lclangAnalysis -lclangAST -lclangLex $CLANG_LIBS" 276 LDFLAGS="$CLANG_LDFLAGS $CLANG_LIBS $SAVE_LDFLAGS" 277 AC_CHECK_LIB([clangEdit], [main], [LIB_CLANG_EDIT=-lclangEdit], []) 278 CLANG_LIBS="$LIB_CLANG_EDIT $CLANG_LIBS" 279 CLANG_LIBS="-lclangParse -lclangSema $CLANG_LIBS" 280 CLANG_LIBS="-lclangFrontend -lclangSerialization $CLANG_LIBS" 281 fi 282 283 CPPFLAGS="$SAVE_CPPFLAGS" 284 LDFLAGS="$SAVE_LDFLAGS" 285 LIBS="$SAVE_LIBS" 286 287 AC_LANG_POP 288 ]) 289
Indexes created Sun Oct 25 00:26:45 UTC 2026