+AC_SUBST(CLANG_CXXFLAGS)
+AC_SUBST(CLANG_LDFLAGS)
+AC_SUBST(CLANG_LIBS)
+AX_SUBMODULE(clang,system|no,no)
+case "$with_clang" in
+system)
+ llvm_config="llvm-config"
+ AC_CHECK_PROG([llvm_config_found], ["$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=`$llvm_config --cxxflags`
+ CLANG_LDFLAGS=`$llvm_config --ldflags`
+ targets=`$llvm_config --targets-built`
+ CLANG_LIBS=`$llvm_config --libs $targets asmparser bitreader support mc`
+ CLANG_PREFIX=`$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_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_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_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"
+ ;;
+esac
+AM_CONDITIONAL(HAVE_CLANG, test $with_clang = system)
+
+AX_SET_WARNING_FLAGS
+
+AC_SUBST(WARNING_FLAGS)
+
+PACKAGE_CFLAGS="$GMP_CPPFLAGS"
+PACKAGE_LDFLAGS="$GMP_LDFLAGS"
+PACKAGE_LIBS="-lisl -lgmp"