commit 82c9b35823a9dd186f2635f35a2e50f291732f69
Author: Chris Xiong <chirs241097@gmail.com>
Date: Fri Sep 16 11:39:08 2022 -0400
compiler take 2
diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 665b42c3b..fb3091665 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -274,9 +274,7 @@ config("compiler") {
configs += [
# See the definitions below.
- ":clang_revision",
":rustc_revision",
- ":compiler_cpu_abi",
":compiler_codegen",
":compiler_deterministic",
]
@@ -527,39 +525,6 @@ config("compiler") {
ldflags += [ "-Wl,-z,keep-text-section-prefix" ]
}
- if (is_clang && !is_nacl && current_os != "zos") {
- cflags += [ "-fcrash-diagnostics-dir=" + clang_diagnostic_dir ]
-
- # TODO(hans): Remove this once Clang generates better optimized debug info
- # by default. https://crbug.com/765793
- cflags += [
- "-mllvm",
- "-instcombine-lower-dbg-declare=0",
- ]
- if (!is_debug && use_thin_lto && is_a_target_toolchain) {
- if (is_win) {
- ldflags += [ "-mllvm:-instcombine-lower-dbg-declare=0" ]
- } else {
- ldflags += [ "-Wl,-mllvm,-instcombine-lower-dbg-declare=0" ]
- }
- }
-
- # TODO(crbug.com/1235145): Investigate why/if this should be needed.
- if (is_win) {
- cflags += [ "/clang:-ffp-contract=off" ]
- } else {
- cflags += [ "-ffp-contract=off" ]
- }
-
- if (default_toolchain != "//build/toolchain/cros:target") {
- # TODO(crbug.com/1361629): Fix the compiler so this is not needed.
- cflags += [
- "-mllvm",
- "-simplifycfg-hoist-common-skip-limit=0",
- ]
- }
- }
-
# Rust compiler setup (for either clang or rustc).
if (enable_rust) {
defines += [ "RUST_ENABLED" ]
@@ -1253,45 +1218,6 @@ config("compiler_deterministic") {
}
}
- # Makes builds independent of absolute file path.
- if (is_clang && strip_absolute_paths_from_debug_symbols) {
- # If debug option is given, clang includes $cwd in debug info by default.
- # For such build, this flag generates reproducible obj files even we use
- # different build directory like "out/feature_a" and "out/feature_b" if
- # we build same files with same compile flag.
- # Other paths are already given in relative, no need to normalize them.
- if (is_nacl) {
- # TODO(https://crbug.com/1231236): Use -ffile-compilation-dir= here.
- cflags += [
- "-Xclang",
- "-fdebug-compilation-dir",
- "-Xclang",
- ".",
- ]
- } else {
- # -ffile-compilation-dir is an alias for both -fdebug-compilation-dir=
- # and -fcoverage-compilation-dir=.
- cflags += [ "-ffile-compilation-dir=." ]
- }
- if (!is_win) {
- # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167)
- asmflags = [ "-Wa,-fdebug-compilation-dir,." ]
- }
-
- if (is_win && use_lld) {
- if (symbol_level == 2 || (is_clang && using_sanitizer)) {
- # Absolutize source file paths for PDB. Pass the real build directory
- # if the pdb contains source-level debug information and if linker
- # reproducibility is not critical.
- ldflags += [ "/PDBSourcePath:" + rebase_path(root_build_dir) ]
- } else {
- # Use a fake fixed base directory for paths in the pdb to make the pdb
- # output fully deterministic and independent of the build directory.
- ldflags += [ "/PDBSourcePath:o:\fake\prefix" ]
- }
- }
- }
-
# Tells the compiler not to use absolute paths when passing the default
# paths to the tools it invokes. We don't want this because we don't
# really need it and it can mess up the goma cache entries.
@@ -1310,25 +1236,26 @@ config("compiler_deterministic") {
}
}
-config("clang_revision") {
- if (is_clang && clang_base_path == default_clang_base_path) {
- update_args = [
- "--print-revision",
- "--verify-version=$clang_version",
- ]
- if (llvm_force_head_revision) {
- update_args += [ "--llvm-force-head-revision" ]
- }
- clang_revision = exec_script("//tools/clang/scripts/update.py",
- update_args,
- "trim string")
-
- # This is here so that all files get recompiled after a clang roll and
- # when turning clang on or off. (defines are passed via the command line,
- # and build system rebuild things when their commandline changes). Nothing
- # should ever read this define.
- defines = [ "CR_CLANG_REVISION=\"$clang_revision\"" ]
- }
+config("clang_revision") { }
+config("xclang_revision") {
+# if (is_clang && clang_base_path == default_clang_base_path) {
+# update_args = [
+# "--print-revision",
+# "--verify-version=$clang_version",
+# ]
+# if (llvm_force_head_revision) {
+# update_args += [ "--llvm-force-head-revision" ]
+# }
+# clang_revision = exec_script("//tools/clang/scripts/update.py",
+# update_args,
+# "trim string")
+#
+# # This is here so that all files get recompiled after a clang roll and
+# # when turning clang on or off. (defines are passed via the command line,
+# # and build system rebuild things when their commandline changes). Nothing
+# # should ever read this define.
+# defines = [ "CR_CLANG_REVISION=\"$clang_revision\"" ]
+# }
}
config("rustc_revision") {
@@ -1616,7 +1543,7 @@ config("chromium_code") {
defines = [ "_HAS_NODISCARD" ]
}
} else {
- cflags = [ "-Wall" ]
+ cflags = [ ]
if (treat_warnings_as_errors) {
cflags += [ "-Werror" ]
@@ -1625,10 +1552,6 @@ config("chromium_code") {
# well.
ldflags = [ "-Werror" ]
}
- if (is_clang) {
- # Enable extra warnings for chromium_code when we control the compiler.
- cflags += [ "-Wextra" ]
- }
# In Chromium code, we define __STDC_foo_MACROS in order to get the
# C99 macros on Mac and Linux.
@@ -1637,16 +1560,6 @@ config("chromium_code") {
"__STDC_FORMAT_MACROS",
]
- if (!is_debug && !using_sanitizer && current_cpu != "s390x" &&
- current_cpu != "s390" && current_cpu != "ppc64" &&
- current_cpu != "mips" && current_cpu != "mips64" &&
- current_cpu != "riscv64") {
- # Non-chromium code is not guaranteed to compile cleanly with
- # _FORTIFY_SOURCE. Also, fortified build may fail when optimizations are
- # disabled, so only do that for Release build.
- defines += [ "_FORTIFY_SOURCE=2" ]
- }
-
if (is_mac) {
cflags_objc = [ "-Wobjc-missing-property-synthesis" ]
cflags_objcc = [ "-Wobjc-missing-property-synthesis" ]
@@ -2041,7 +1954,8 @@ config("default_stack_frames") {
}
# Default "optimization on" config.
-config("optimize") {
+config("optimize") { }
+config("xoptimize") {
if (is_win) {
if (chrome_pgo_phase != 2) {
# Favor size over speed, /O1 must be before the common flags.
@@ -2086,7 +2000,8 @@ config("optimize") {
}
# Turn off optimizations.
-config("no_optimize") {
+config("no_optimize") { }
+config("xno_optimize") {
if (is_win) {
cflags = [
"/Od", # Disable optimization.
@@ -2126,7 +2041,8 @@ config("no_optimize") {
# Turns up the optimization level. On Windows, this implies whole program
# optimization and link-time code generation which is very expensive and should
# be used sparingly.
-config("optimize_max") {
+config("optimize_max") { }
+config("xoptimize_max") {
if (is_nacl && is_nacl_irt) {
# The NaCl IRT is a special case and always wants its own config.
# Various components do:
@@ -2159,7 +2075,8 @@ config("optimize_max") {
#
# TODO(crbug.com/621335) - rework how all of these configs are related
# so that we don't need this disclaimer.
-config("optimize_speed") {
+config("optimize_speed") { }
+config("xoptimize_speed") {
if (is_nacl && is_nacl_irt) {
# The NaCl IRT is a special case and always wants its own config.
# Various components do:
@@ -2185,7 +2102,8 @@ config("optimize_speed") {
}
}
-config("optimize_fuzzing") {
+config("optimize_fuzzing") { }
+config("xoptimize_fuzzing") {
cflags = [ "-O1" ] + common_optimize_on_cflags
rustflags = [ "-Copt-level=1" ]
ldflags = common_optimize_on_ldflags
@@ -2305,7 +2223,8 @@ config("win_pdbaltpath") {
}
# Full symbols.
-config("symbols") {
+config("symbols") { }
+config("xsymbols") {
if (is_win) {
if (is_clang) {
cflags = [ "/Z7" ] # Debug information in the .obj files.
@@ -2430,7 +2349,8 @@ config("symbols") {
# Minimal symbols.
# This config guarantees to hold symbol for stack trace which are shown to user
# when crash happens in unittests running on buildbot.
-config("minimal_symbols") {
+config("minimal_symbols") { }
+config("xminimal_symbols") {
if (is_win) {
# Functions, files, and line tables only.
cflags = []
@@ -2502,7 +2422,8 @@ config("minimal_symbols") {
# This configuration contains function names only. That is, the compiler is
# told to not generate debug information and the linker then just puts function
# names in the final debug information.
-config("no_symbols") {
+config("no_symbols") { }
+config("xno_symbols") {
if (is_win) {
ldflags = [ "/DEBUG" ]
