QT5 build: CC: No such file or directory

Michele31415

While building qt5 in Solaris 11.4 SPARC, I get:

root@hemlock:/opt/qt5/qtbase# ../configure -developer-build -opensource -nomake examples -nomake test
+ cd qtbase
+ /opt/qt5/qtbase/configure -top-level -developer-build -opensource -nomake examples -nomake test
Preparing build tree...
<srcbase> = /opt/qt5/qtbase 
<bldbase> = /opt/qt5/qtbase/qtbase 
<outbase> = /opt/qt5/qtbase/qtbase 
Creating qmake...
gmake: CC: No such file or directory
gmake: *** [Makefile:246: main.o] Error 127
.root@hemlock:/opt/qt5/qtbase#echo $cc
/usr/bin/gcc
root@hemlock:/opt/qt5/qtbase# echo $CC
/usr/bin/gcc
root@hemlock:/opt/qt5/qtbase#

What am I doing wrong?

SGaist

Hi,

Looks like you have no compiler installed.

Unrelated note: do not work as root especially when building/installing libraries. You might nuke your system if something goes wrong.

Michele31415

Point taken, but I do have a working compiler:

/opt/qt5 $ cd qtbase
/opt/qt5/qtbase $ which gcc         
/usr/bin/gcc
/opt/qt5/qtbase $ gcc --version
gcc (GCC) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

/opt/qt5/qtbase $ gcc ~/helloworld.c
/opt/qt5/qtbase $ ~/a.out
Hello, World!/opt/qt5/qtbase $

Michele31415

The problem seems to be in this part of qtbase/configure (lines 814-817):

bash -c 'set -o pipefail
                cd "$0/qmake"; "$1" | while read line; do
                    builtin echo -n .
                done' "$outpath" "$MAKE" || exit 2

$1 has no value. Why, I do not know.

SGaist

Did you try to specify the Solaris mkspec ?

Michele31415

Ah ha! I set QMAKE_CC and QMAKE_CXX in qtbase/mkspecs/solaris-cc/qmake.conf and that got me going again. Configure went much further this time but now it's stopped with this:

/opt/qt5/qtbase/src/corelib/global/qrandom.cpp: In function ‘void fallback_fill(quint32*, qsizetype)’:
/opt/qt5/qtbase/src/corelib/global/qrandom.cpp:297:18: error: ‘getauxval’ was not declared in this scope
  297 |     ulong base = getauxval(AT_BASE);

Apparently getauxval is some linux thing. There's a discussion around this here: http://lists.opencsw.org/pipermail/users/2019-January/010420.html so unless anyone has a better suggestion, I'll pursue that.

Michele31415

I decided the simplest thing was to just remove getauxval since it seemed to be optional anyway. Now we've made more progress. configure is almost finished but ends like this:
...........

(long list of files redacted)
...Done.
Info: creating super cache file /opt/qt5/qtbase/.qmake.super
Info: creating cache file /opt/qt5/qtbase/.qmake.cache
ERROR: Invalid value 'test' supplied to command line option 'nomake'.
/opt/qt5/qtbase $

SGaist

Isn't it "-nomake tests" ?

Michele31415

Good catch - I missed the last character when I copied the command out of the instructions. But now I'm getting the "You cannot make a shadow build from a source tree containing a previous build.
Cannot proceed." message.
Is my only option to delete the entire qt5 directory and start over? I'm not seeing a "confclean" option.

SGaist

I'd go with make distclean but I am not sure, I haven't done any in tree build since over a decade. Always out of source, it allows you to keep your sources clean and start from scratch more easily.

Michele31415

I'm just following the recipe here: https://wiki.qt.io/Building_Qt_5_from_Git

$ mkdir qt5-build
$ cd qt5-build
$ ..\\qt5\configure -developer-build -opensource -nomake examples -nomake tests

In any event distclean did not work for me.

/opt/qt5/qtbase $ gmake distclean
gmake: *** No rule to make target 'distclean'.  Stop.
/opt/qt5/qtbase $

Update: Oh dear - I just noticed I somehow ended up in qtbase rather than qt5-build. Why don't I just start over.

SGaist

Well, since you are getting started, it's not a bad idea to just build qtbase. You can then build the rest later on.

Michele31415

I just started over from scratch. This time it almost finished:

..Done.
Info: creating stash file /opt/qt5/qt5-build/.qmake.stash
Info: creating super cache file /opt/qt5/qt5-build/.qmake.super

Running configuration tests...
Checking for gold linker... yes
Checking for valid makespec... 
ERROR: Cannot compile a minimal program. The toolchain or QMakeSpec is broken.

Check config.log for details.

/opt/qt5/qt5-build $ cat config.log
executing config test use_gold_linker
+ cd /opt/qt5/qt5-build/qtbase/config.tests && /usr/gcc/10/bin/g++ -fuse-ld=gold -o conftest-out conftest.cpp
test config.qtbase.tests.use_gold_linker succeeded
executing config test verifyspec
+ cd /opt/qt5/qt5-build/qtbase/config.tests/common/verifyspec && /opt/qt5/qt5-build/qtbase/bin/qmake -qtconf /opt/qt5/qt5-build/qtbase/bin/qt.conf "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared use_gold_linker console" /opt/qt5/qtbase/config.tests/common/verifyspec
+ cd /opt/qt5/qt5-build/qtbase/config.tests/common/verifyspec && MAKEFLAGS= /opt/csw/bin/gmake
> /usr/gcc/10/bin/g++ -c -O2  -I/opt/qt5/qtbase/config.tests/common/verifyspec -I. -I/usr/sfw/include -I/opt/qt5/qtbase/mkspecs/solaris-cc -o verifyspec.o /opt/qt5/qtbase/config.tests/common/verifyspec/verifyspec.cpp
> CC  -o verifyspec verifyspec.o   -L/usr/sfw/lib 
> gmake: CC: No such file or directory
> gmake: *** [Makefile:64: verifyspec] Error 127
/opt/qt5/qt5-build $

So it looks like we're back to this "no CC" business. I thought I had fixed that with the following change to qtbase/mkspecs/mkspec.conf:

#QMAKE_CXX               = CC
QMAKE_CXX               = /usr/gcc/10/bin/g++

Technically this was more of an end-run than a fix. I still don't know where CC is being set. So there must be another instance somewhere I can't find.

SGaist

Silly question but did you check your environment variables ?

Note that you seem to set only QMAKE_CXX, did you also set the other one ?

Michele31415

Yes, I also said this in qtbase/mkspecs/mkspec.conf

#QMAKE_COMPILER          = sun_cc
QMAKE_COMPILER          = gcc

Env vars are:

/opt/qt5/qt5-build $ echo $CC
/usr/gcc/10/bin/gcc
/opt/qt5/qt5-build $ echo $CXX
/usr/gcc/10/bin/g++
/opt/qt5/qt5-build $ which gcc
/usr/gcc/10/bin/gcc
/opt/qt5/qt5-build $ gcc --version
gcc (GCC) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

/opt/qt5/qt5-build $ g++ --version
g++ (GCC) 10.2.0
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

/opt/qt5/qt5-build $ which gcc

Do I need anything else there?

SGaist

What about the QMAKE_CC variable ?

Michele31415

That's set too:

# QMAKE_COMPILER          = sun_cc
QMAKE_COMPILER          = gcc

QMAKE_CC                = gcc

SGaist

I just realized, did you try to specific the platform in your configure options ?

Michele31415

Uh, I guess not. What file would that be?

SGaist

Based on the mkspecs available, I would try the solaris-g++ or solaris-g++-64.