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Diffstat (limited to '')
| -rw-r--r-- | build/autoconf/clang-plugin.m4 | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/build/autoconf/clang-plugin.m4 b/build/autoconf/clang-plugin.m4 new file mode 100644 index 0000000000..2bbb471e5b --- /dev/null +++ b/build/autoconf/clang-plugin.m4 @@ -0,0 +1,107 @@ +dnl This Source Code Form is subject to the terms of the Mozilla Public +dnl License, v. 2.0. If a copy of the MPL was not distributed with this +dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. + +AC_DEFUN([MOZ_CONFIG_CLANG_PLUGIN], [ + +if test -n "$ENABLE_CLANG_PLUGIN"; then + dnl For some reason the llvm-config downloaded from clang.llvm.org for clang3_8 + dnl produces a -isysroot flag for a sysroot which might not ship when passed + dnl --cxxflags. We use sed to remove this argument so that builds work on OSX + dnl + dnl For a similar reason, we remove any -gcc-toolchain arguments, since the + dnl directories specified by such arguments might not exist on the current + dnl machine. + LLVM_CXXFLAGS=`$LLVM_CONFIG --cxxflags | sed -e 's/-isysroot [[^ ]]*//' -e 's/-gcc-toolchain [[^ ]]*//'` + + LLVM_LDFLAGS=`$LLVM_CONFIG --ldflags | tr '\n' ' '` + + if test "${HOST_OS_ARCH}" = "Darwin"; then + dnl We need to make sure that we use the symbols coming from the clang + dnl binary. In order to do this, we need to pass -flat_namespace and + dnl -undefined suppress to the linker. This makes sure that we link the + dnl symbols into the flat namespace provided by clang, and thus get + dnl access to all of the symbols which are undefined in our dylib as we + dnl are building it right now, and also that we don't fail the build + dnl due to undefined symbols (which will be provided by clang). + CLANG_LDFLAGS="-Wl,-flat_namespace -Wl,-undefined,suppress" + dnl We are loaded into clang, so we don't need to link to very many things, + dnl we just need to link to clangASTMatchers because it is not used by clang + CLANG_LDFLAGS="$CLANG_LDFLAGS `$LLVM_CONFIG --prefix`/lib/libclangASTMatchers.a" + dnl We need to remove -L/path/to/clang/lib from LDFLAGS to ensure that we + dnl don't accidentally link against the libc++ there which is a newer + dnl version that what our build machines have installed. + LLVM_LDFLAGS=`echo "$LLVM_LDFLAGS" | sed -E 's/-L[[^ ]]+\/clang\/lib//'` + elif test "${HOST_OS_ARCH}" = "WINNT"; then + CLANG_LDFLAGS="clangASTMatchers.lib clang.lib" + else + CLANG_LDFLAGS="-lclangASTMatchers" + fi + + if test -n "$CLANG_CL"; then + dnl The llvm-config coming with clang-cl may give us arguments in the + dnl /ARG form, which in msys will be interpreted as a path name. So we + dnl need to split the args and convert the leading slashes that we find + dnl into a dash. + LLVM_REPLACE_CXXFLAGS='' + for arg in $LLVM_CXXFLAGS; do + dnl The following expression replaces a leading slash with a dash. + dnl Also replace any backslashes with forward slash. + arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'` + LLVM_REPLACE_CXXFLAGS="$LLVM_REPLACE_CXXFLAGS $arg" + done + LLVM_CXXFLAGS="$LLVM_REPLACE_CXXFLAGS" + dnl We'll also want to replace `-std:` with `-Xclang -std=` so that + dnl LLVM_CXXFLAGS can correctly override the `-Xclang -std=` set by + dnl toolchain.configure. + LLVM_CXXFLAGS=`echo "$LLVM_CXXFLAGS"|sed -e 's/ \(-Xclang \|\)-std[[:=]]/ -Xclang -std=/'` + + LLVM_REPLACE_LDFLAGS='' + for arg in $LLVM_LDFLAGS; do + dnl The following expression replaces a leading slash with a dash. + dnl Also replace any backslashes with forward slash. + arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'` + LLVM_REPLACE_LDFLAGS="$LLVM_REPLACE_LDFLAGS $arg" + done + LLVM_LDFLAGS="$LLVM_REPLACE_LDFLAGS" + + CLANG_REPLACE_LDFLAGS='' + for arg in $CLANG_LDFLAGS; do + dnl The following expression replaces a leading slash with a dash. + dnl Also replace any backslashes with forward slash. + arg=`echo "$arg"|sed -e 's/^\//-/' -e 's/\\\\/\//g'` + CLANG_REPLACE_LDFLAGS="$CLANG_REPLACE_LDFLAGS $arg" + done + CLANG_LDFLAGS="$CLANG_REPLACE_LDFLAGS" + fi + + CLANG_PLUGIN_FLAGS="-Xclang -load -Xclang $CLANG_PLUGIN -Xclang -add-plugin -Xclang moz-check" + + AC_DEFINE(MOZ_CLANG_PLUGIN) +fi + +if test -n "$ENABLE_MOZSEARCH_PLUGIN"; then + if test -z "${ENABLE_CLANG_PLUGIN}"; then + AC_MSG_ERROR([Can't use mozsearch plugin without --enable-clang-plugin.]) + fi + + CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -add-plugin -Xclang mozsearch-index" + + dnl Parameters are: srcdir, outdir (path where output JSON is stored), objdir. + CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $_topsrcdir" + CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $_objdir/mozsearch_index" + CLANG_PLUGIN_FLAGS="$CLANG_PLUGIN_FLAGS -Xclang -plugin-arg-mozsearch-index -Xclang $_objdir" + + AC_DEFINE(MOZ_MOZSEARCH_PLUGIN) +fi + +AC_SUBST_LIST(CLANG_PLUGIN_FLAGS) +AC_SUBST_LIST(LLVM_CXXFLAGS) +AC_SUBST_LIST(LLVM_LDFLAGS) +AC_SUBST_LIST(CLANG_LDFLAGS) + +AC_SUBST(ENABLE_CLANG_PLUGIN) +AC_SUBST(ENABLE_CLANG_PLUGIN_ALPHA) +AC_SUBST(ENABLE_MOZSEARCH_PLUGIN) + +]) |