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gn: Compute is_clang correctly

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is_clang is hardcoded to 'false' which works great when using gcc
compiler, however it does not work when using clang compiler with
yocto from meta-clang, since toolchain file encodes is_clang = false
but then uses clang for cc/cxx lot of GN checks in chromium go wrong
due to is_clang assuming wrong value and compilation fails

e.g.

| CMake Error at /home/khem/actions-runner-yoe/_work/yoe-distro/yoe-distro/build/tmp/work/cortexa57-yoe-linux/qtwebengine/6.9.0/git/cmake/QtGnGen.cmake:95 (message):
|
|
|   -- GN FAILED
|
|   ERROR at
|   //base/allocator/partition_allocator/src/partition_alloc/BUILD.gn:499:7
|   (//build/toolchain/yocto:yocto_native): Assertion failed.
|
|         assert(stack_scan_supported)
|         ^-----
|
|   See //base/allocator/partition_allocator/BUILD.gn:7:19: which caused the
|   file to be included.
|
|     public_deps = [ "src/partition_alloc:raw_ptr" ]
|                     ^----------------------------
|

Therefore, compute this flag based upon toolchains used to compile QT
in yocto environment.

Pick-to: 6.9
Change-Id: I42d3fc77d7241d842e3fbbc991ee5cdcfc39f46f
Reviewed-by: Samuli Piippo <samuli.piippo@qt.io>
This commit is contained in:
Khem Raj 2025-03-25 01:04:09 -07:00
parent 8f6cb41085
commit 3e9d7c06da
1 changed files with 17 additions and 1 deletions
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18
recipes-qt/qt6/gn-utils.inc
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@ -50,6 +50,20 @@ def gn_host_pkg_config(d):
"""Return absolute paths to pkg-config-native."""
return d.getVar("STAGING_BINDIR_NATIVE") + "/" + "pkg-config-native"
def gn_clang(d):
"""Return true if using clang compiler else return false"""
if "clang++" in d.getVar("CXX"):
return "true"
else:
return "false"
def gn_clang_native(d):
"""Return true if using native clang compiler else return false"""
if "clang++" in d.getVar("BUILD_CXX"):
return "true"
else:
return "false"
def write_toolchain_file(d, file_path):
"""Creates a complete GN toolchain file in |file_path|."""
import string
@ -72,7 +86,7 @@ def write_toolchain_file(d, file_path):
' toolchain_args = {\n'
' current_cpu = "${current_cpu}"\n'
' current_os = "linux"\n'
' is_clang = false\n'
' is_clang = ${is_clang}\n'
' host_pkg_config = "${host_pkg_config}"\n'
' }\n'
'}\n'
@ -80,6 +94,7 @@ def write_toolchain_file(d, file_path):
native_toolchain = {
'toolchain_name': 'yocto_native',
'is_clang': gn_clang_native(d),
'current_cpu': gn_host_arch_name(d),
'host_pkg_config': gn_host_pkg_config(d),
'cc': d.expand('${BUILD_CC}'),
@ -94,6 +109,7 @@ def write_toolchain_file(d, file_path):
}
target_toolchain = {
'toolchain_name': 'yocto_target',
'is_clang': gn_clang(d),
'current_cpu': gn_target_arch_name(d),
'host_pkg_config': gn_host_pkg_config(d),
'cc': d.expand('${CC}'),