163 lines
6.7 KiB
Plaintext
163 lines
6.7 KiB
Plaintext
dnl This Source Code Form is subject to the terms of the Mozilla Public
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dnl License, v. 2.0. If a copy of the MPL was not distributed with this
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dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
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AC_DEFUN([MOZ_CONFIG_CLANG_PLUGIN], [
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MOZ_ARG_ENABLE_BOOL(clang-plugin,
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[ --enable-clang-plugin Enable building with the mozilla clang plugin ],
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ENABLE_CLANG_PLUGIN=1,
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ENABLE_CLANG_PLUGIN= )
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if test -n "$ENABLE_CLANG_PLUGIN"; then
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if test -z "${CLANG_CC}${CLANG_CL}"; then
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AC_MSG_ERROR([Can't use clang plugin without clang.])
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fi
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AC_MSG_CHECKING([for llvm-config])
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if test -z "$LLVMCONFIG"; then
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if test -n "$CLANG_CL"; then
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CXX_COMPILER="$(dirname "$CXX")/clang"
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else
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CXX_COMPILER="${CXX}"
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fi
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LLVMCONFIG=`$CXX_COMPILER -print-prog-name=llvm-config`
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fi
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if test -z "$LLVMCONFIG"; then
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LLVMCONFIG=`which llvm-config`
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fi
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if test ! -x "$LLVMCONFIG"; then
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AC_MSG_RESULT([not found])
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AC_MSG_ERROR([Cannot find an llvm-config binary for building a clang plugin])
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fi
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AC_MSG_RESULT([$LLVMCONFIG])
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if test -z "$LLVMCONFIG"; then
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AC_MSG_ERROR([Cannot find an llvm-config binary for building a clang plugin])
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fi
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dnl For some reason the llvm-config downloaded from clang.llvm.org for clang3_8
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dnl produces a -isysroot flag for a sysroot which might not ship when passed
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dnl --cxxflags. We use sed to remove this argument so that builds work on OSX
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LLVM_CXXFLAGS=`$LLVMCONFIG --cxxflags | sed -e 's/-isysroot [[^ ]]*//'`
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dnl We are loaded into clang, so we don't need to link to very many things,
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dnl we just need to link to clangASTMatchers because it is not used by clang
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LLVM_LDFLAGS=`$LLVMCONFIG --ldflags | tr '\n' ' '`
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if test "${HOST_OS_ARCH}" = "Darwin"; then
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dnl We need to make sure that we use the symbols coming from the clang
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dnl binary. In order to do this, we need to pass -flat_namespace and
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dnl -undefined suppress to the linker. This makes sure that we link the
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dnl symbols into the flat namespace provided by clang, and thus get
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dnl access to all of the symbols which are undefined in our dylib as we
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dnl are building it right now, and also that we don't fail the build
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dnl due to undefined symbols (which will be provided by clang).
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CLANG_LDFLAGS="-Wl,-flat_namespace -Wl,-undefined,suppress -lclangASTMatchers"
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elif test "${HOST_OS_ARCH}" = "WINNT"; then
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CLANG_LDFLAGS="clangASTMatchers.lib"
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else
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CLANG_LDFLAGS="-lclangASTMatchers"
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fi
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if test -n "$CLANG_CL"; then
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dnl The llvm-config coming with clang-cl may give us arguments in the
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dnl /ARG form, which in msys will be interpreted as a path name. So we
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dnl need to split the args and convert the leading slashes that we find
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dnl into a dash.
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LLVM_REPLACE_CXXFLAGS=''
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for arg in $LLVM_CXXFLAGS; do
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dnl The following expression replaces a leading slash with a dash.
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dnl Also replace any backslashes with forward slash.
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arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'`
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LLVM_REPLACE_CXXFLAGS="$LLVM_REPLACE_CXXFLAGS $arg"
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done
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LLVM_CXXFLAGS="$LLVM_REPLACE_CXXFLAGS"
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LLVM_REPLACE_LDFLAGS=''
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for arg in $LLVM_LDFLAGS; do
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dnl The following expression replaces a leading slash with a dash.
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dnl Also replace any backslashes with forward slash.
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arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'`
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LLVM_REPLACE_LDFLAGS="$LLVM_REPLACE_LDFLAGS $arg"
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done
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LLVM_LDFLAGS="$LLVM_REPLACE_LDFLAGS"
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CLANG_REPLACE_LDFLAGS=''
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for arg in $CLANG_LDFLAGS; do
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dnl The following expression replaces a leading slash with a dash.
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dnl Also replace any backslashes with forward slash.
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arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'`
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CLANG_REPLACE_LDFLAGS="$CLANG_REPLACE_LDFLAGS $arg"
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done
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CLANG_LDFLAGS="$CLANG_REPLACE_LDFLAGS"
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fi
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dnl Check for the new ASTMatcher API names. Since this happened in the
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dnl middle of the 3.8 cycle, our CLANG_VERSION_FULL is impossible to use
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dnl correctly, so we have to detect this at configure time.
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AC_CACHE_CHECK(for new ASTMatcher API,
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ac_cv_have_new_ASTMatcher_api,
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[
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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_SAVE_CXXFLAGS="$CXXFLAGS"
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_SAVE_CXX="$CXX"
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_SAVE_MACOSX_DEPLOYMENT_TARGET="$MACOSX_DEPLOYMENT_TARGET"
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unset MACOSX_DEPLOYMENT_TARGET
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CXXFLAGS="${LLVM_CXXFLAGS}"
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CXX="${HOST_CXX}"
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AC_TRY_COMPILE([#include "clang/ASTMatchers/ASTMatchers.h"],
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[clang::ast_matchers::cxxConstructExpr();],
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ac_cv_have_new_ASTMatcher_names="yes",
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ac_cv_have_new_ASTMatcher_names="no")
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CXX="$_SAVE_CXX"
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CXXFLAGS="$_SAVE_CXXFLAGS"
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export MACOSX_DEPLOYMENT_TARGET="$_SAVE_MACOSX_DEPLOYMENT_TARGET"
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AC_LANG_RESTORE
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])
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if test "$ac_cv_have_new_ASTMatcher_names" = "yes"; then
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LLVM_CXXFLAGS="$LLVM_CXXFLAGS -DHAVE_NEW_ASTMATCHER_NAMES"
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fi
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dnl Check if we can compile has(ignoringParenImpCasts()) because
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dnl before 3.9 that ignoringParenImpCasts was done internally by "has".
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dnl See https://www.mail-archive.com/cfe-commits@lists.llvm.org/msg25234.html
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AC_CACHE_CHECK(for has with ignoringParenImpCasts,
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ac_cv_has_accepts_ignoringParenImpCasts,
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[
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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_SAVE_CXXFLAGS="$CXXFLAGS"
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_SAVE_CXX="$CXX"
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_SAVE_MACOSX_DEPLOYMENT_TARGET="$MACOSX_DEPLOYMENT_TARGET"
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unset MACOSX_DEPLOYMENT_TARGET
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CXXFLAGS="${LLVM_CXXFLAGS}"
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CXX="${HOST_CXX}"
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AC_TRY_COMPILE([#include "clang/ASTMatchers/ASTMatchers.h"],
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[using namespace clang::ast_matchers;
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expr(has(ignoringParenImpCasts(declRefExpr())));
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],
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ac_cv_has_accepts_ignoringParenImpCasts="yes",
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ac_cv_has_accepts_ignoringParenImpCasts="no")
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CXX="$_SAVE_CXX"
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CXXFLAGS="$_SAVE_CXXFLAGS"
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export MACOSX_DEPLOYMENT_TARGET="$_SAVE_MACOSX_DEPLOYMENT_TARGET"
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AC_LANG_RESTORE
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])
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if test "$ac_cv_has_accepts_ignoringParenImpCasts" = "yes"; then
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LLVM_CXXFLAGS="$LLVM_CXXFLAGS -DHAS_ACCEPTS_IGNORINGPARENIMPCASTS"
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fi
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AC_DEFINE(MOZ_CLANG_PLUGIN)
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fi
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AC_SUBST(LLVM_CXXFLAGS)
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AC_SUBST(LLVM_LDFLAGS)
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AC_SUBST(CLANG_LDFLAGS)
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AC_SUBST(ENABLE_CLANG_PLUGIN)
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])
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