qt5-qtwebengine fails to build on armv7
https://build.alpinelinux.org/buildlogs/build-edge-armv7/community/qt5-qtwebengine/qt5-qtwebengine-5.15.3_git20200401-r2.log
[17438/24637] CXX host/obj/base/base/base_jumbo_37.o
FAILED: host/obj/base/base/base_jumbo_37.o
/usr/bin/g++ -MMD -MF host/obj/base/base/base_jumbo_37.o.d -DUSE_SYMBOLIZE -DUSE_UDEV -DUSE_AURA=1 -DUSE_NSS_CERTS=1 -DUSE_OZONE=1 -DOFFICIAL_BUILD -DTOOLKIT_QT -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -DNO_UNWIND_TABLES -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -DNDEBUG -DNVALGRIND -DDYNAMIC_ANNOTATIONS_ENABLED=0 -DBASE_IMPLEMENTATION -DU_USING_ICU_NAMESPACE=0 -DU_ENABLE_DYLOAD=0 -DUSE_CHROMIUM_ICU=1 -DU_ENABLE_TRACING=1 -DU_ENABLE_RESOURCE_TRACING=0 -DU_STATIC_IMPLEMENTATION -DICU_UTIL_DATA_IMPL=ICU_UTIL_DATA_FILE -DUCHAR_TYPE=uint16_t -I. -Ihost/gen -I../../3rdparty/chromium -I../../3rdparty/chromium/third_party/perfetto/include -Ihost/gen/third_party/perfetto/build_config -Ihost/gen/third_party/perfetto -I../../3rdparty/chromium/third_party/abseil-cpp -I../../3rdparty/chromium/third_party/boringssl/src/include -I../../3rdparty/chromium/third_party/protobuf/src -Ihost/gen/protoc_out -I../../3rdparty/chromium/third_party/icu/source/common -I../../3rdparty/chromium/third_party/icu/source/i18n -fno-strict-aliasing --param=ssp-buffer-size=4 -fstack-protector -fno-unwind-tables -fno-asynchronous-unwind-tables -fPIC -pipe -pthread -march=armv7-a -mfloat-abi=hard -mtune=generic-armv7-a -mfpu=vfpv3-d16 -marm -Wall -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -Wno-psabi -Wno-unused-local-typedefs -Wno-maybe-uninitialized -Wno-deprecated-declarations -fno-delete-null-pointer-checks -Wno-comments -Wno-packed-not-aligned -Wno-dangling-else -Wno-missing-field-initializers -Wno-unused-parameter -fno-omit-frame-pointer -g0 -fvisibility=hidden -O2 -fno-ident -fdata-sections -ffunction-sections -std=gnu++14 -Wno-narrowing -Wno-class-memaccess -Wno-attributes -Wno-class-memaccess -Wno-subobject-linkage -Wno-invalid-offsetof -Wno-return-type -Wno-deprecated-copy -fno-exceptions -fno-rtti -fvisibility-inlines-hidden -c host/gen/base/base_jumbo_37.cc -o host/obj/base/base/base_jumbo_37.o
In file included from ./../../3rdparty/chromium/base/rand_util_posix.cc:21,
from host/gen/base/base_jumbo_37.cc:8:
../../3rdparty/chromium/third_party/lss/linux_syscall_support.h: In function 'int sys_fstatat(int, const char*, kernel_stat64*, int)':
../../3rdparty/chromium/third_party/lss/linux_syscall_support.h:2603:39: error: '__NR_fstatat' was not declared in this scope; did you mean 'sys_fstatat'?
2603 | : "i"(__NR_##name) , ## args \
| ^~~~~
../../3rdparty/chromium/third_party/lss/linux_syscall_support.h:2634:9: note: in expansion of macro 'LSS_BODY'
2634 | LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3)); \
| ^~~~~~~~
../../3rdparty/chromium/third_party/lss/linux_syscall_support.h:4253:16: note: in expansion of macro '_syscall4'
4253 | LSS_INLINE _syscall4(int, fstatat64, int, d,
| ^~~~~~~~~