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ce83c42681
We want our clang bootstrap to use the GCC headers we're building with, not whatever sysroot it happens to find on the server we're building on. The -gcc-toolchain argument we specify when building clang will also be picked up by llvm-config, so we need to strip it out when building the plugin. Otherwise, we will get peculiar failures about not being able to find C++ header files. Differential Revision: https://phabricator.services.mozilla.com/D22880 --HG-- extra : moz-landing-system : lando
197 lines
8.4 KiB
Plaintext
197 lines
8.4 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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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 "$LLVMCONFIG"; then
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AC_MSG_ERROR([Cannot find an llvm-config binary for building a clang plugin])
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fi
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dnl For some reason the llvm-config downloaded from clang.llvm.org for clang3_8
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dnl produces a -isysroot flag for a sysroot which might not ship when passed
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dnl --cxxflags. We use sed to remove this argument so that builds work on OSX
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dnl
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dnl For a similar reason, we remove any -gcc-toolchain arguments, since the
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dnl directories specified by such arguments might not exist on the current
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dnl machine.
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LLVM_CXXFLAGS=`$LLVMCONFIG --cxxflags | sed -e 's/-isysroot [[^ ]]*//' -e 's/-gcc-toolchain [[^ ]]*//'`
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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"
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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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CLANG_LDFLAGS="$CLANG_LDFLAGS `$LLVMCONFIG --prefix`/lib/libclangASTMatchers.a"
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dnl We need to remove -L/path/to/clang/lib from LDFLAGS to ensure that we
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dnl don't accidentally link against the libc++ there which is a newer
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dnl version that what our build machines have installed.
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LLVM_LDFLAGS=`echo "$LLVM_LDFLAGS" | sed -E 's/-L[[^ ]]+\/clang\/lib//'`
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elif test "${HOST_OS_ARCH}" = "WINNT"; then
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CLANG_LDFLAGS="clangASTMatchers.lib clang.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_names,
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[
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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_SAVE_CXXFLAGS="$CXXFLAGS"
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_SAVE_CPPFLAGS="$CPPFLAGS"
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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="${LLVM_CXXFLAGS}"
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CPPFLAGS=""
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CXX="${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="$_SAVE_CXX"
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CPPFLAGS="$_SAVE_CPPFLAGS"
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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="$CXXFLAGS"
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_SAVE_CPPFLAGS="$CPPFLAGS"
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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="${LLVM_CXXFLAGS}"
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CPPFLAGS=""
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CXX="${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="$_SAVE_CXX"
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CPPFLAGS="$_SAVE_CPPFLAGS"
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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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CLANG_PLUGIN_FLAGS="-Xclang -load -Xclang $CLANG_PLUGIN -Xclang -add-plugin -Xclang moz-check"
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AC_DEFINE(MOZ_CLANG_PLUGIN)
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fi
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if test -n "$ENABLE_MOZSEARCH_PLUGIN"; then
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if test -z "${ENABLE_CLANG_PLUGIN}"; then
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AC_MSG_ERROR([Can't use mozsearch plugin without --enable-clang-plugin.])
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fi
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dnl We use this construct rather than $_objdir to avoid getting /js/src in the
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dnl path when compiling JS code.
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OBJDIR="$(dirname $(dirname $(dirname $CLANG_PLUGIN)))"
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CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -add-plugin -Xclang mozsearch-index"
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dnl Parameters are: srcdir, outdir (path where output JSON is stored), objdir.
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CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $_topsrcdir"
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CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $OBJDIR/mozsearch_index"
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CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $OBJDIR"
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AC_DEFINE(MOZ_MOZSEARCH_PLUGIN)
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fi
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AC_SUBST_LIST(CLANG_PLUGIN_FLAGS)
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AC_SUBST_LIST(LLVM_CXXFLAGS)
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AC_SUBST_LIST(LLVM_LDFLAGS)
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AC_SUBST_LIST(CLANG_LDFLAGS)
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AC_SUBST(ENABLE_CLANG_PLUGIN)
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AC_SUBST(ENABLE_MOZSEARCH_PLUGIN)
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])
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