1 AC_DEFUN([AX_DETECT_CLANG], [
2 AC_SUBST(CLANG_CXXFLAGS)
3 AC_SUBST(CLANG_LDFLAGS)
8 if test "x$with_clang_prefix" != "x"; then
9 LLVM_CONFIG="$with_clang_prefix/bin/llvm-config"
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])
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 $c"
31 CLANG_LIBS=`$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 $systemlibs"
36 CLANG_PREFIX=`$LLVM_CONFIG --prefix`
37 AC_DEFINE_UNQUOTED(CLANG_PREFIX, ["$CLANG_PREFIX"], [Clang installation prefix])
39 # If $CLANG_PREFIX/bin/clang cannot find the standard include files,
40 # then see if setting sysroot to `xcode-select -p`/SDKs/MacOSX.sdk helps.
41 # This may be required on some versions of OS X since they lack /usr/include.
42 # If so, set CLANG_SYSROOT accordingly.
44 CC="$CLANG_PREFIX/bin/clang"
46 [whether $CLANG_PREFIX/bin/clang can find standard include files])
48 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[]])],
50 AC_MSG_RESULT([$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])
56 sysroot=`$XCODE_SELECT -p`/SDKs/MacOSX.sdk
57 SAVE_CPPFLAGS="$CPPFLAGS"
58 CPPFLAGS="$CPPFLAGS -isysroot $sysroot"
60 [whether standard include files can be found with sysroot set])
62 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]], [[]])],
64 AC_MSG_RESULT([$found_header])
65 CPPFLAGS="$SAVE_CPPFLAGS"
66 if test "x$found_header" != "xyes"; then
67 AC_MSG_ERROR([Cannot find standard include files])
69 AC_DEFINE_UNQUOTED([CLANG_SYSROOT], ["$sysroot"],
70 [Define to sysroot if needed])
77 SAVE_CPPFLAGS="$CPPFLAGS"
78 CPPFLAGS="$CLANG_CXXFLAGS -I$srcdir $CPPFLAGS"
79 AC_CHECK_HEADER([clang/Basic/SourceLocation.h], [],
80 [AC_ERROR([clang header file not found])])
81 AC_EGREP_HEADER([getDefaultTargetTriple], [llvm/Support/Host.h], [],
82 [AC_DEFINE([getDefaultTargetTriple], [getHostTriple],
83 [Define to getHostTriple for older versions of clang])])
84 AC_EGREP_HEADER([getExpansionLineNumber], [clang/Basic/SourceLocation.h], [],
85 [AC_DEFINE([getExpansionLineNumber], [getInstantiationLineNumber],
86 [Define to getInstantiationLineNumber for older versions of clang])])
87 AC_EGREP_HEADER([getImmediateExpansionRange], [clang/Basic/SourceManager.h],
89 [AC_DEFINE([getImmediateExpansionRange],
90 [getImmediateInstantiationRange],
91 [Define to getImmediateInstantiationRange for older versions of clang])]
93 AC_EGREP_HEADER([DiagnosticsEngine], [clang/Basic/Diagnostic.h], [],
94 [AC_DEFINE([DiagnosticsEngine], [Diagnostic],
95 [Define to Diagnostic for older versions of clang])])
96 AC_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
106 AC_EGREP_HEADER([CXXIsProduction], [clang/Driver/Driver.h],
107 [AC_DEFINE([HAVE_CXXISPRODUCTION], [],
108 [Define if Driver constructor takes CXXIsProduction argument])])
109 AC_EGREP_HEADER([ IsProduction], [clang/Driver/Driver.h],
110 [AC_DEFINE([HAVE_ISPRODUCTION], [],
111 [Define if Driver constructor takes IsProduction argument])])
112 AC_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])])
118 AC_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])])
127 AC_CHECK_HEADER([clang/Basic/DiagnosticOptions.h],
128 [AC_DEFINE([HAVE_BASIC_DIAGNOSTICOPTIONS_H], [],
129 [Define if clang/Basic/DiagnosticOptions.h exists])])
130 AC_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>])
134 AC_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])])
141 AC_TRY_COMPILE([#include <clang/Basic/TargetInfo.h>], [
142 using namespace clang;
144 DiagnosticsEngine *Diags;
145 TargetInfo::CreateTargetInfo(*Diags, TO);
146 ], [AC_DEFINE([CREATETARGETINFO_TAKES_POINTER], [],
147 [Define if TargetInfo::CreateTargetInfo takes pointer])])
148 AC_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])])
155 AC_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])])
161 AC_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])])
167 AC_EGREP_HEADER([getReturnType],
168 [clang/AST/CanonicalType.h], [],
169 [AC_DEFINE([getReturnType], [getResultType],
170 [Define to getResultType for older versions of clang])])
171 AC_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])])
177 AC_EGREP_HEADER([setMainFileID], [clang/Basic/SourceManager.h],
178 [AC_DEFINE([HAVE_SETMAINFILEID], [],
179 [Define if SourceManager has a setMainFileID method])])
180 AC_CHECK_HEADER([llvm/ADT/OwningPtr.h],
181 [AC_DEFINE([HAVE_ADT_OWNINGPTR_H], [],
182 [Define if llvm/ADT/OwningPtr.h exists])])
183 AC_EGREP_HEADER([initializeBuiltins],
184 [clang/Basic/Builtins.h], [],
185 [AC_DEFINE([initializeBuiltins], [InitializeBuiltins],
186 [Define to InitializeBuiltins for older versions of clang])])
187 AC_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], [$IK_C],
191 [Define to Language::C or InputKind::C for newer versions of clang])
194 #include <clang/Basic/TargetOptions.h>
195 #include <clang/Lex/PreprocessorOptions.h>
196 #include <clang/Frontend/CompilerInstance.h>
198 #include "set_lang_defaults_arg4.h"
200 using namespace clang;
201 CompilerInstance *Clang;
203 llvm::Triple T(TO.Triple);
204 PreprocessorOptions PO;
205 CompilerInvocation::setLangDefaults(Clang->getLangOpts(), IK_C,
206 T, setLangDefaultsArg4(PO),
207 LangStandard::lang_unspecified);
208 ], [AC_DEFINE([SETLANGDEFAULTS_TAKES_5_ARGUMENTS], [],
209 [Define if CompilerInvocation::setLangDefaults takes 5 arguments])])
211 #include <clang/Frontend/CompilerInstance.h>
212 #include <clang/Frontend/CompilerInvocation.h>
214 using namespace clang;
215 CompilerInvocation *invocation;
216 CompilerInstance *Clang;
217 Clang->setInvocation(std::make_shared<CompilerInvocation>(*invocation));
218 ], [AC_DEFINE([SETINVOCATION_TAKES_SHARED_PTR], [],
219 [Defined if CompilerInstance::setInvocation takes a shared_ptr])])
220 AC_CHECK_HEADER([llvm/Option/Arg.h],
221 [AC_DEFINE([HAVE_LLVM_OPTION_ARG_H], [],
222 [Define if llvm/Option/Arg.h exists])])
223 CPPFLAGS="$SAVE_CPPFLAGS"
225 SAVE_LDFLAGS="$LDFLAGS"
226 LDFLAGS="$CLANG_LDFLAGS $LDFLAGS"
228 # Use single libclang-cpp shared library when available.
229 # Otherwise, use a selection of clang libraries that appears to work.
230 AC_CHECK_LIB([clang-cpp], [main], [have_lib_clang=yes], [have_lib_clang=no])
231 if test "$have_lib_clang" = yes; then
232 CLANG_LIBS="-lclang-cpp $CLANG_LIBS"
234 CLANG_LIBS="-lclangBasic -lclangDriver $CLANG_LIBS"
235 CLANG_LIBS="-lclangAnalysis -lclangAST -lclangLex $CLANG_LIBS"
236 LDFLAGS="$CLANG_LDFLAGS $CLANG_LIBS $SAVE_LDFLAGS"
237 AC_CHECK_LIB([clangEdit], [main], [LIB_CLANG_EDIT=-lclangEdit], [])
238 CLANG_LIBS="$LIB_CLANG_EDIT $CLANG_LIBS"
239 CLANG_LIBS="-lclangParse -lclangSema $CLANG_LIBS"
240 CLANG_LIBS="-lclangFrontend -lclangSerialization $CLANG_LIBS"
243 LDFLAGS="$SAVE_LDFLAGS"