Trying to build Qt 5.5.1 on Ubuntu 18.04

[mastroj]

Hello everyone.

Sorry for the over-abused question but I'm not able to successfully build Qt 5.5.1 on my Ubuntu 18.04 laptop (I need this specific version because of dependencies with other software).

System configuration:

• Ubuntu 18.04.2 LTS bionic
• gcc 7.3.0 (Ubuntu 7.3.0-27ubuntu1~18.04)
• GNU Make 4.1 built for x86_64-pc-linux-gnu
• Postgres 9.6.2 (libs)
• Qt 5.5.1
• OpenSSL 1.0.2r
• No leveldb folder under qtwebkit/Tools/qmake/config.tests
• Using make -j4
• Python 2.7.15rc1 [GCC 7.3.0]

Configure settings:

./configure -opensource -confirm-license -qt-sql-psql -qt-sql-sqlite -qt-zlib -qt-libpng -qt-libjpeg -release -nomake examples -nomake tests -openssl -I /usr/local/ssl/include -L /usr/local/ssl/lib -I /usr/local/postgres/9.6.12/include -L /usr/local/postgres/9.6.12/lib -qt-xcb -no-use-gold-linker

Error:

API/JSStringRef.cpp: In function ‘OpaqueJSString* JSStringCreateWithCharacters(const JSChar*, size_t)’:
API/JSStringRef.cpp:40:50: error: invalid conversion from ‘const JSChar* {aka const short unsigned int*}’ to ‘const UChar* {aka const char16_t*}’ [-fpermissive]
     return OpaqueJSString::create(chars, numChars).leakRef();
                                                  ^
In file included from API/JSStringRef.cpp:31:0:
API/OpaqueJSString.h:49:39: note:   initializing argument 1 of ‘static WTF::PassRefPtr<OpaqueJSString> OpaqueJSString::create(const UChar*, unsigned int)’
     static PassRefPtr<OpaqueJSString> create(const UChar* characters, unsigned length)
                                       ^~~~~~
API/JSStringRef.cpp: In function ‘OpaqueJSString* JSStringCreateWithCharactersNoCopy(const JSChar*, size_t)’:
API/JSStringRef.cpp:65:125: error: invalid conversion from ‘const JSChar* {aka const short unsigned int*}’ to ‘const UChar* {aka const char16_t*}’ [-fpermissive]
     return OpaqueJSString::create(StringImpl::createWithoutCopying(chars, numChars, WTF::DoesNotHaveTerminatingNullCharacter)).leakRef();
                                                                                                                             ^
In file included from ../WTF/wtf/text/WTFString.h:29:0,
                 from API/OpaqueJSString.h:30,
                 from API/JSStringRef.cpp:31:
../WTF/wtf/text/StringImpl.h:431:57: note:   initializing argument 1 of ‘static WTF::PassRefPtr<WTF::StringImpl> WTF::StringImpl::createWithoutCopying(const UChar*, unsigned int, WTF::HasTerminatingNullCharacter)’
     WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> createWithoutCopying(const UChar* characters, unsigned length, HasTerminatingNullCharacter);
                                                         ^~~~~~~~~~~~~~~~~~~~
API/JSStringRef.cpp: In function ‘const JSChar* JSStringGetCharactersPtr(JSStringRef)’:
API/JSStringRef.cpp:86:30: error: invalid conversion from ‘const UChar* {aka const char16_t*}’ to ‘const JSChar* {aka const short unsigned int*}’ [-fpermissive]
     return string->characters();
            ~~~~~~~~~~~~~~~~~~^~
make[3]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1-8/qtwebkit/Source/JavaScriptCore'
Makefile.JavaScriptCore:98: recipe for target 'sub-Target-pri-make_first-ordered' failed
make[2]: *** [sub-Target-pri-make_first-ordered] Error 2
make[2]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1-8/qtwebkit/Source/JavaScriptCore'
Makefile:93: recipe for target 'sub-Source-JavaScriptCore-JavaScriptCore-pro-make_first-ordered' failed
make[1]: *** [sub-Source-JavaScriptCore-JavaScriptCore-pro-make_first-ordered] Error 2
make[1]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1-8/qtwebkit'
Makefile:490: recipe for target 'module-qtwebkit-make_first' failed
make: *** [module-qtwebkit-make_first] Error 2

Extra question(s): are there any know issues by using make -jX? can warnings be disabled? (using -w does nothing)

I'm out of ideas, any thoughts?

Thanks in advance.

Further investigations:

#1 Maybe it's something related to ICU but I'm still not sure.
#2 Applied patch found in QTBUG-35971 to no avail
#3 Applied patch found here.. testing
#4 Compiled with no errors with the aforementioned patch, but getting errors on install (see post)

[mrjj]

Hi and welcome to the forums
Yes. Seems to something with ICU
https://bugreports.qt.io/browse/QTBUG-35971
and webkit

[mastroj]

Tried to apply the patch but it didn't work unfortunately.

Just for reference

• libicu-dev is already the newest version (60.2-3ubuntu3)
• icu-devtools is already the newest version (60.2-3ubuntu3)

Further updates added to original post.

[SGaist]

Hi and welcome to devnet,

Before losing too much time with it, do you really need to build QtWebkit ?

[mastroj]

Hi, yes, I need QtWebkit. :(

Small update: I applied the patch mentioned in the original post and it compiled with no errors.

Unfortunately after launching make install I get the following errors

compiler_version.py failed to execute: c++ -dumpversion
'NoneType' object has no attribute 'group'
Exception: Failed to extract compiler version for args: ['host', 'compiler']
Traceback (most recent call last):
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 484, in CallLoadTargetBuildFile
    includes, depth, check, False)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 399, in LoadTargetBuildFile
    build_file_data, PHASE_EARLY, variables, build_file_path)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1193, in ProcessVariablesAndConditionsInDict
    variables, build_file, 'variables')
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1245, in ProcessVariablesAndConditionsInDict
    ProcessConditionsInDict(the_dict, phase, variables, build_file)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1124, in ProcessConditionsInDict
    variables, build_file)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1245, in ProcessVariablesAndConditionsInDict
    ProcessConditionsInDict(the_dict, phase, variables, build_file)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1124, in ProcessConditionsInDict
    variables, build_file)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 1200, in ProcessVariablesAndConditionsInDict
    expanded = ExpandVariables(value, phase, variables, build_file)
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/tools/gyp/pylib/gyp/input.py", line 897, in ExpandVariables
    replacement = str(py_module.DoMain(parsed_contents[1:])).rstrip()
  File "/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/3rdparty/chromium/build/compiler_version.py", line 122, in DoMain
    raise Exception("Failed to extract compiler version for args: %s" % args)
Exception: Failed to extract compiler version for args: ['host', 'compiler']

Project ERROR: -- running gyp_qtwebengine failed --
Makefile:71: recipe for target 'sub-gyp_run-pro-install_subtargets' failed
make[3]: *** [sub-gyp_run-pro-install_subtargets] Error 3
make[3]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src/core'
Makefile:60: recipe for target 'sub-core-install_subtargets' failed
make[2]: *** [sub-core-install_subtargets] Error 2
make[2]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine/src'
Makefile:56: recipe for target 'sub-src-install_subtargets' failed
make[1]: *** [sub-src-install_subtargets] Error 2
make[1]: Leaving directory '/home/mastroj/Desktop/src/qt-src-5.5.1p-16/qtwebengine'
Makefile:815: recipe for target 'module-qtwebengine-install_subtargets' failed
make: *** [module-qtwebengine-install_subtargets] Error 2

Seems something related to Python. For reference I'm using Python 2.7.15rc1 [GCC 7.3.0].

[SGaist]

That's QtWebEngine that is failing. Which module do you need ? QtWebkit or QtWebEngine ?

[mastroj]

I think I can probably skip it. I'm going to clean up everything, re-configure skipping QtWebEngine and try re-compiling.

[Anselmo]

@mastroj I met similar issue when building CEF(Chromium Embedded Framework). It uses compiler_version.py, too.
In my case, near line 54, the below source codes exist:

def GetVersion(compiler, tool):
  tool_output = tool_error = None
  cache_key = (compiler, tool)
  cached_version = compiler_version_cache.get(cache_key)
  if cached_version:
    return cached_version
  try:
    # Note that compiler could be something tricky like "distcc g++".
    if tool == "compiler":
      compiler = compiler + " -dumpversion"
      # 4.6
      version_re = re.compile(r"(\d+)\.(\d+)")

Maybe, from g++(or gcc) version 7, -dumpversion option shows only major version such as 7, so that the regular expression of compiler_version.py raises an exception because it expects the version including minor one.
So, I modified the option from -dumpversion to -dumpfullversion, and then it works well.