Hi, I can't immediately comment on why the header is not found, there are a lot of moving pieces.
But one workaround to try might be to configure qtwebengine with -no-feature-webengine-qt-harfbuzz . I think that should cause the build system to try and use the chromium provided harfbuzz sources, rather than the qt ones. Otherwise, I'd suggest filing a bug report against the webengine component on the qt bug tracker, with all the details on how you're building qt. > On 14. Jul 2025, at 18:47, Marcel Gotsch via Interest > <interest@qt-project.org> wrote: > > Hi, > > we're trying to build Qt 6.9.1 from sources, but face an issue on macOS. > Somehow the harfbuzz includes aren't found when building qtwebengine. > > I've already started to debug the CMake code involved and what I was able to > find out so far is that qtwebengine uses the HarfbuzzPrivate interface > library to determine the INTERFACE_INCLUDE_DIRECTORIES which are then > injected into some generated GN scripts. The includes match the list > mentioned in the compiler error below, but they don't the necessary > qtbase/3rdparty/harfbuzz-ng/include/harfbuzz path. The HarfbuzzPrivate > library is defined purely by qt_internal_add_3rdparty_header_module, which > doesn't add the necessary include directories. We're a bit lost at the moment > how this is supposed to work. > > Any help is much appreciated! > > Here's the exact compiler error: > > FAILED: obj/third_party/freetype/freetype_source/autofit.o > ../../../../../../../../../../../Applications/Xcode-v15.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang > -MMD -MF obj/third_party/freetype/freetype_source/autofit.o.d > -DHAVE_UNISTD_H -DHAVE_FCNTL_H -DFT2_BUILD_LIBRARY -DOFFICIAL_BUILD > -DTOOLKIT_QT -DCR_XCODE_VERSION=1620 > -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -DNDEBUG -DNVALGRIND > -DDYNAMIC_ANNOTATIONS_ENABLED=0 > -DFT_CONFIG_MODULES_H=\"freetype-custom/freetype/config/ftmodule.h\" > -DFT_CONFIG_OPTIONS_H=\"freetype-custom/freetype/config/ftoption.h\" > -DPDFIUM_REQUIRED_MODULES -DCHROMIUM_RESTRICT_VISIBILITY > -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/include/freetype/config > -Igen -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium > -I/Volumes/build/jenkins-build/8acaa1/sources/build-Qt-6.9.1-R1-macx-clang-static/qtbase/include > > -I/Volumes/build/jenkins-build/8acaa1/sources/build-Qt-6.9.1-R1-macx-clang-static/qtbase/include/QtHarfbuzz > -I/Volumes/ build/jenkins-build/8acaa1/sources/libs/qt5/qtbase/src/3rdparty/harfbuzz-ng -I/Volumes/build/jenkins-build/8acaa1/sources/build-Qt-6.9.1-R1-macx-clang-static/qtbase/src/3rdparty/harfbuzz-ng -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/include -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/include/freetype-custom -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/include -I../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/zlib -fno-delete-null-pointer-checks -fno-ident -fno-strict-aliasing -fstack-protector -Wno-unknown-argument -Wno-unknown-attributes -Wno-unknown-warning-option -Wno-ignored-attributes -Wno-predefined-identifier-outside-function -Wno-self-assign -Wno-unknown-pragmas -fcolor-diagnostics -fmerge-all-constants -fno-sized-deallocation --target=x86_64-apple-macos -O2 -fno-math-errno -fno-omit-frame-pointer -g0 -isysroot ../../../../../.. /../../../../../Applications/Xcode-v16.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.2.sdk -mmacos-version-min=13.0 -fvisibility=hidden -Wheader-hygiene -Wstring-conversion -Wtautological-overlap-compare -Wall -Wno-unused-variable -Wno-c++11-narrowing -Wno-unused-but-set-variable -Wno-misleading-indentation -Wunguarded-availability -Wno-missing-field-initializers -Wno-unused-parameter -Wno-psabi -Wloop-analysis -Wno-unneeded-internal-declaration -Wno-deprecated-declarations -Wno-cast-function-type -Wno-vla-extension -Wno-thread-safety-reference-return -Wno-deprecated-declarations -Wno-unused-function -isystem/opt/homebrew/opt/libpng/include/libpng16 -std=c11 -c ../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/src/autofit/autofit.c -o obj/third_party/freetype/freetype_source/autofit.o > In file included from > ../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/src/autofit/autofit.c:21: > In file included from > ../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/src/autofit/ft-hb.c:32: > ../../../../../../libs/qt5/qtwebengine/src/3rdparty/chromium/third_party/freetype/src/src/autofit/ft-hb.h:30:10: > fatal error: 'hb.h' file not found > #include <hb.h> > ^~~~~~ > 1 error generated. > > Best, > > Marcel Gotsch > _______________________________________________ > Interest mailing list > Interest@qt-project.org > https://lists.qt-project.org/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
