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AC_DEFUN([AX_DETECT_CLANG], [
AC_SUBST(CLANG_CXXFLAGS)
AC_SUBST(CLANG_LDFLAGS)
AC_SUBST(CLANG_LIBS)
AC_PROG_GREP
AC_PROG_SED
llvm_config="llvm-config"
AC_CHECK_PROG([llvm_config_found], ["$llvm_config"], [yes])
if test "x$with_clang_prefix" != "x"; then
llvm_config="$with_clang_prefix/bin/llvm-config"
if test -x "$llvm_config"; then
llvm_config_found=yes
fi
fi
if test "$llvm_config_found" != yes; then
AC_MSG_ERROR([llvm-config not found])
fi
CLANG_CXXFLAGS=`$llvm_config --cxxflags | \
$SED -e 's/-Wcovered-switch-default//;s/-gsplit-dwarf//'`
CLANG_LDFLAGS=`$llvm_config --ldflags`
targets=`$llvm_config --targets-built`
components="$targets asmparser bitreader support mc"
$llvm_config --components | $GREP option > /dev/null 2> /dev/null
if test $? -eq 0; then
components="$components option"
fi
CLANG_LIBS=`$llvm_config --libs $components`
systemlibs=`$llvm_config --system-libs 2> /dev/null | tail -1`
if test $? -eq 0; then
CLANG_LIBS="$CLANG_LIBS $systemlibs"
fi
CLANG_PREFIX=`$llvm_config --prefix`
AC_DEFINE_UNQUOTED(CLANG_PREFIX, ["$CLANG_PREFIX"], [Clang installation prefix])
SAVE_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CLANG_CXXFLAGS $CPPFLAGS"
AC_LANG_PUSH(C++)
AC_CHECK_HEADER([clang/Basic/SourceLocation.h], [],
[AC_ERROR([clang header file not found])])
AC_EGREP_HEADER([getDefaultTargetTriple], [llvm/Support/Host.h], [],
[AC_DEFINE([getDefaultTargetTriple], [getHostTriple],
[Define to getHostTriple for older versions of clang])])
AC_EGREP_HEADER([getExpansionLineNumber], [clang/Basic/SourceLocation.h], [],
[AC_DEFINE([getExpansionLineNumber], [getInstantiationLineNumber],
[Define to getInstantiationLineNumber for older versions of clang])])
AC_EGREP_HEADER([DiagnosticsEngine], [clang/Basic/Diagnostic.h], [],
[AC_DEFINE([DiagnosticsEngine], [Diagnostic],
[Define to Diagnostic for older versions of clang])])
AC_EGREP_HEADER([ArrayRef], [clang/Driver/Driver.h],
[AC_DEFINE([USE_ARRAYREF], [],
[Define if Driver::BuildCompilation takes ArrayRef])])
AC_EGREP_HEADER([CXXIsProduction], [clang/Driver/Driver.h],
[AC_DEFINE([HAVE_CXXISPRODUCTION], [],
[Define if Driver constructor takes CXXIsProduction argument])])
AC_EGREP_HEADER([ IsProduction], [clang/Driver/Driver.h],
[AC_DEFINE([HAVE_ISPRODUCTION], [],
[Define if Driver constructor takes IsProduction argument])])
AC_TRY_COMPILE([#include <clang/Driver/Driver.h>], [
using namespace clang;
DiagnosticsEngine *Diags;
new driver::Driver("", "", "", *Diags);
], [AC_DEFINE([DRIVER_CTOR_TAKES_DEFAULTIMAGENAME], [],
[Define if Driver constructor takes default image name])])
AC_EGREP_HEADER([void HandleTopLevelDecl\(], [clang/AST/ASTConsumer.h],
[AC_DEFINE([HandleTopLevelDeclReturn], [void],
[Return type of HandleTopLevelDeclReturn])
AC_DEFINE([HandleTopLevelDeclContinue], [],
[Return type of HandleTopLevelDeclReturn])],
[AC_DEFINE([HandleTopLevelDeclReturn], [bool],
[Return type of HandleTopLevelDeclReturn])
AC_DEFINE([HandleTopLevelDeclContinue], [true],
[Return type of HandleTopLevelDeclReturn])])
AC_CHECK_HEADER([clang/Basic/DiagnosticOptions.h],
[AC_DEFINE([HAVE_BASIC_DIAGNOSTICOPTIONS_H], [],
[Define if clang/Basic/DiagnosticOptions.h exists])])
AC_CHECK_HEADER([clang/Lex/PreprocessorOptions.h],
[AC_DEFINE([HAVE_LEX_PREPROCESSOROPTIONS_H], [],
[Define if clang/Lex/PreprocessorOptions.h exists])], [],
[#include <clang/Basic/LLVM.h>])
AC_TRY_COMPILE([#include <clang/Basic/TargetInfo.h>], [
using namespace clang;
std::shared_ptr<TargetOptions> TO;
DiagnosticsEngine *Diags;
TargetInfo::CreateTargetInfo(*Diags, TO);
], [AC_DEFINE([CREATETARGETINFO_TAKES_SHARED_PTR], [],
[Define if TargetInfo::CreateTargetInfo takes shared_ptr])])
AC_TRY_COMPILE([#include <clang/Basic/TargetInfo.h>], [
using namespace clang;
TargetOptions *TO;
DiagnosticsEngine *Diags;
TargetInfo::CreateTargetInfo(*Diags, TO);
], [AC_DEFINE([CREATETARGETINFO_TAKES_POINTER], [],
[Define if TargetInfo::CreateTargetInfo takes pointer])])
AC_TRY_COMPILE([#include <clang/Frontend/CompilerInstance.h>], [
using namespace clang;
DiagnosticConsumer *client;
CompilerInstance *Clang;
Clang->createDiagnostics(client);
], [], [AC_DEFINE([CREATEDIAGNOSTICS_TAKES_ARG], [],
[Define if CompilerInstance::createDiagnostics takes argc and argv])])
AC_TRY_COMPILE([#include <clang/Lex/HeaderSearchOptions.h>], [
using namespace clang;
HeaderSearchOptions HSO;
HSO.AddPath("", frontend::Angled, false, false);
], [AC_DEFINE([ADDPATH_TAKES_4_ARGUMENTS], [],
[Define if HeaderSearchOptions::AddPath takes 4 arguments])])
AC_EGREP_HEADER([getNumParams],
[clang/AST/CanonicalType.h],
[AC_DEFINE([getNumArgs], [getNumParams],
[Define to getNumParams for newer versions of clang])
AC_DEFINE([getArgType], [getParamType],
[Define to getParamType for newer versions of clang])])
AC_EGREP_HEADER([getReturnType],
[clang/AST/CanonicalType.h], [],
[AC_DEFINE([getReturnType], [getResultType],
[Define to getResultType for older versions of clang])])
AC_TRY_COMPILE([#include <clang/Frontend/CompilerInstance.h>], [
using namespace clang;
CompilerInstance *Clang;
Clang->createPreprocessor(TU_Complete);
], [AC_DEFINE([CREATEPREPROCESSOR_TAKES_TUKIND], [],
[Define if CompilerInstance::createPreprocessor takes TranslationUnitKind])])
AC_EGREP_HEADER([setMainFileID], [clang/Basic/SourceManager.h],
[AC_DEFINE([HAVE_SETMAINFILEID], [],
[Define if SourceManager has a setMainFileID method])])
AC_CHECK_HEADER([llvm/ADT/OwningPtr.h],
[AC_DEFINE([HAVE_ADT_OWNINGPTR_H], [],
[Define if llvm/ADT/OwningPtr.h exists])])
AC_EGREP_HEADER([initializeBuiltins],
[clang/Basic/Builtins.h], [],
[AC_DEFINE([initializeBuiltins], [InitializeBuiltins],
[Define to InitializeBuiltins for older versions of clang])])
AC_EGREP_HEADER([IK_C], [clang/Frontend/FrontendOptions.h], [],
[AC_DEFINE([IK_C], [InputKind::C],
[Define to InputKind::C for newer versions of clang])])
AC_TRY_COMPILE([
#include <clang/Basic/TargetOptions.h>
#include <clang/Lex/PreprocessorOptions.h>
#include <clang/Frontend/CompilerInstance.h>
], [
using namespace clang;
CompilerInstance *Clang;
TargetOptions TO;
llvm::Triple T(TO.Triple);
PreprocessorOptions PO;
CompilerInvocation::setLangDefaults(Clang->getLangOpts(), IK_C,
T, PO, LangStandard::lang_unspecified);
], [AC_DEFINE([SETLANGDEFAULTS_TAKES_5_ARGUMENTS], [],
[Define if CompilerInvocation::setLangDefaults takes 5 arguments])])
AC_TRY_COMPILE([
#include <clang/Frontend/CompilerInstance.h>
#include <clang/Frontend/CompilerInvocation.h>
], [
using namespace clang;
CompilerInvocation *invocation;
CompilerInstance *Clang;
Clang->setInvocation(std::make_shared<CompilerInvocation>(*invocation));
], [AC_DEFINE([SETINVOCATION_TAKES_SHARED_PTR], [],
[Defined if CompilerInstance::setInvocation takes a shared_ptr])])
AC_LANG_POP
CPPFLAGS="$SAVE_CPPFLAGS"
SAVE_LDFLAGS="$LDFLAGS"
LDFLAGS="$CLANG_LDFLAGS $LDFLAGS"
AC_SUBST(LIB_CLANG_EDIT)
AC_CHECK_LIB([clangEdit], [main], [LIB_CLANG_EDIT=-lclangEdit], [])
LDFLAGS="$SAVE_LDFLAGS"
])
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