Problems Building MySql plugin on Mac M1 Qt 6.1.2

[Vince2480]

I've been struggling with this for a week now, feeling pretty frustrated, but having finally found the right MySql package, I'm nearly there.

Problem now is in the last steps of building the MySql plugin and I think the doc (https://doc-snapshots.qt.io/qt6-dev/sql-driver.html#qmysql) is wrong!

The first step seems to have generated all the files without errors.

qt-cmake -G"Ninja" <qt_installation_path>/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=<qt_installation_path>/<platform> -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.<so|dylib>"

The second step isn't.

qt-cmake --build .

CMake Error: Unknown argument --build
CMake Error: Run 'cmake --help' for all supported options.
etc...etc..etc...

Does the dot (.) indicates the current directory?
If so, I changed the parameters, 

qt-cmake --build ../build-sqldrivers

And that seemed to work, as seen in the summary:
Configure summary:

Qt Sql Drivers:
DB2 (IBM) .............................. no
InterBase .............................. no
MySql .................................. yes
OCI (Oracle) ........................... no
ODBC ................................... no
PostgreSQL ............................. no
SQLite ................................. yes
Using system provided SQLite ......... no

-- Configuring done
-- Generating done
CMake Warning:
Manually-specified variables were not used by the project:

CMAKE_TOOLCHAIN_FILE

-- Build files have been written to: /Users/vinceieraci/Qt/6.1.2/Src/qtbase/src/plugins/build-sqldrivers

But I don't see any plugins.
Was that warning important?
Can anyone help me please?

[Christian Ehrlicher]

@Vince2480 said in Problems Building MySql plugin on Mac M1 Qt 6.1.2:

But I don't see any plugins.

Because you did not build it anywhere. Call make or whatever your build command is as explained in the documentation.

[Vince2480]

@Christian-Ehrlicher Where is this line wrong?

qt-cmake -G"Ninja" /users/vinceieraci/qt/6.1.2/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/users/vinceieraci/qt/6.1.2/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib"

[Christian Ehrlicher]

@Vince2480 Sorry, I've overseen --build

Does this command executes gcc or clang (don't know what you're using). If so a .so file should be created in your build dir.

[Vince2480]

@Christian-Ehrlicher There is no .so file in that directory.
It appears to be using AppleClang.
Here is the full output.

-- The CXX compiler identification is AppleClang 12.0.5.12050022
-- The C compiler identification is AppleClang 12.0.5.12050022
-- The ASM compiler identification is Clang
-- Found assembler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/clang - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE  
-- Performing Test HAVE_STDATOMIC
-- Performing Test HAVE_STDATOMIC - Success
-- Found WrapAtomic: TRUE  
-- Check for feature set changes
-- Looking for a OBJC compiler
-- Looking for a OBJC compiler - /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-- The OBJC compiler identification is AppleClang 12.0.5.12050022
-- Detecting OBJC compiler ABI info
-- Detecting OBJC compiler ABI info - done
-- Check for working OBJC compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang - skipped
-- Looking for a OBJCXX compiler
-- Looking for a OBJCXX compiler - /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
-- The OBJCXX compiler identification is AppleClang 12.0.5.12050022
-- Detecting OBJCXX compiler ABI info
-- Detecting OBJCXX compiler ABI info - done
-- Check for working OBJCXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ - skipped
-- Could NOT find DB2 (missing: DB2_INCLUDE_DIR DB2_LIBRARY) 
-- Found MySQL: /usr/local/mysql/lib/libmysqlclient.dylib  
-- Could NOT find PostgreSQL (missing: PostgreSQL_LIBRARY PostgreSQL_INCLUDE_DIR) 
-- Could NOT find Oracle (missing: Oracle_LIBRARY Oracle_INCLUDE_DIR) 
-- Could NOT find ODBC (missing: ODBC_INCLUDE_DIR) 
-- Found SQLite3: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk/usr/include (found version "3.32.3") 
-- Could NOT find Interbase (missing: Interbase_LIBRARY Interbase_INCLUDE_DIR) 
-- Performing Test HAVE_DASH_UNDEFINED_SYMBOLS
-- Performing Test HAVE_DASH_UNDEFINED_SYMBOLS - Success
-- Performing Test HAVE_DASH_DASH_NO_UNDEFINED
-- Performing Test HAVE_DASH_DASH_NO_UNDEFINED - Failed
-- The following packages have been found:

 * Qt6BuildInternals
 * Qt6CoreTools (required version >= 6.1.2)
 * Qt6Core
 * Qt6Sql
 * Qt6 (required version >= 6.1.0)
 * MySQL, MySQL client library, <https://www.mysql.com>
 * SQLite3

-- The following OPTIONAL packages have not been found:

 * DB2, IBM DB2 client library, <https://www.ibm.com>
 * PostgreSQL
 * Oracle, Oracle client library, <https://www.oracle.com>
 * ODBC
 * Interbase, Interbase client library, <https://www.embarcadero.com/products/interbase>

Configure summary:

Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. yes
  OCI (Oracle) ........................... no
  ODBC ................................... no
  PostgreSQL ............................. no
  SQLite ................................. yes
    Using system provided SQLite ......... no

-- Configuring done
-- Generating done
-- Build files have been written to: /Users/vinceieraci/Qt/6.1.2/Src/qtbase/src/plugins/build-sqldrivers

[Christian Ehrlicher]

Your output only covers the configure step, not the build step. As I said (and you already told me) you have to call cmake --build or make afterwards.

[Vince2480]

@Christian-Ehrlicher OK, I can see a file CMakeError.log and there is an issue with gcc. What does the mean? Do I have to download something else or is it already somewhere on my system?

Checking whether the ASM compiler is GNU using "--version" did not match "(GNU assembler)|(GCC)|(Free Software Foundation)":
Apple clang version 12.0.5 (clang-1205.0.22.11)
Target: arm64-apple-darwin20.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
Compiling the OBJC compiler identification source file "CMakeOBJCCompilerId.m" failed.
Compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang 
Build flags: 
Id flags:  

The output was:
1
ld: library not found for -lSystem
clang: error: linker command failed with exit code 1 (use -v to see invocation)


Compiling the OBJCXX compiler identification source file "CMakeOBJCXXCompilerId.mm" failed.
Compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ 
Build flags: 
Id flags:  

The output was:
1
ld: library not found for -lc++
clang: error: linker command failed with exit code 1 (use -v to see invocation)


Performing C++ SOURCE FILE Test HAVE_DASH_DASH_NO_UNDEFINED failed with the following output:
Change Dir: /Users/vinceieraci/Qt/6.1.2/Src/qtbase/src/plugins/build-sqldrivers/CMakeFiles/CMakeTmp

Run Build Command(s):/opt/local/bin/ninja cmTC_bead5 && [1/2] Building CXX object CMakeFiles/cmTC_bead5.dir/src.cxx.o
[2/2] Linking CXX executable cmTC_bead5
FAILED: cmTC_bead5 
: && /usr/bin/clang++ -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -mmacosx-version-min=10.14 -Wl,-search_paths_first -Wl,-headerpad_max_install_names -Wl,--no-undefined CMakeFiles/cmTC_bead5.dir/src.cxx.o -o cmTC_bead5   && :
ld: unknown option: --no-undefined
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.


Source file was:
int main() {}

[Christian Ehrlicher]

I don't see what CMakeError.log has to do with it - the configuration stage is fine. Now you only have to compile it as already said two times - giving up...

[Vince2480]

@Christian-Ehrlicher Thanks for helping.

[Vince2480]

So is it that the ASM compiler doesn't match the required gcc version?
I've installed gcc-11 using brew and it's first in the $PATH variable, but it's still defaulting ti the Xcode clang version.

[Christian Ehrlicher]

Is it so hard to simply type make to actually build to sources??

[Vince2480]

@Christian-Ehrlicher I've done that, this is what I get...

% make

make: *** No targets specified and no makefile found. Stop.

[Christian Ehrlicher]

@Vince2480 said in Problems Building MySql plugin on Mac M1 Qt 6.1.2:

/Users/vinceieraci/Qt/6.1.2/Src/qtbase/src/plugins/build-sqldrivers

In this directory? I doubt so - configure worked fine so there must be a Makefile or something similar.

[Vince2480]

@Christian-Ehrlicher No, configure didn't.

I want to check we're on the same track.
The first step was:

qt-cmake -G"Ninja" /users/vinceieraci/qt/6.1.2/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/users/vinceieraci/qt/6.1.2/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib"

I think that's what you're referring to the configure step, and although the terminal output indicated success, it generated the error log that I posted earlier.

[jsulm]

@Vince2480 The Cake call WAS successful (according to your own Make output you posted). Forget the error log.
Do you call make in this folder: /Users/vinceieraci/Qt/6.1.2/Src/qtbase/src/plugins/build-sqldrivers ?

[SGaist]

Hi,

Just to be sure we are all one the same path: Qt 6 documentation:

mkdir build-sqldrivers
cd build-sqldrivers

qt-cmake -G"Ninja" <qt_installation_path>/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=<qt_installation_path>/<platform> -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.<so|dylib>"
qt-cmake --build .
qt-cmake --install

Where did you create build-sqldrivers ?
Did you properly CS into it ?

[Vince2480]

Thank you everyone so much for staying with me. At age 70, my brain skips what is so obvious, so I’ve spent the last couple of days going over everything I’ve done, and from what I can see, it’s all to the doc.

I’ll detail everything and I hope it will answer everything you're asking me.

This is my default zsh shell path:

vinceieraci@Vinces-MBP2 sqldrivers % echo $PATH                                              
/opt/local/bin:/opt/local/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/Apple/usr/bin:

Then I add:

vinceieraci@Vinces-MBP2 sqldrivers export PATH=$PATH:/users/vinceieraci/Qt/6.1.2/macos/bin

Now start the steps:

vinceieraci@Vinces-MBP2 sqldrivers % mkdir build-sqldrivers
vinceieraci@Vinces-MBP2 sqldrivers % cd build-sqldrivers
vinceieraci@Vinces-MBP2 build-sqldrivers % qt-cmake -G"Ninja" /users/vinceieraci/qt/6.1.2/Src/qtbase/src/plugins/sqldrivers -DCMAKE_INSTALL_PREFIX=/users/vinceieraci/qt/6.1.2/macos -DMySQL_INCLUDE_DIR="/usr/local/mysql/include" -DMySQL_LIBRARY="/usr/local/mysql/lib/libmysqlclient.dylib"

Files created:
vinceieraci@Vinces-MBP2 build-sqldrivers % ls -l
total 272
-rw-r--r-- 1 vinceieraci staff 47968 5 Aug 09:37 CMakeCache.txt
drwxr-xr-x 13 vinceieraci staff 416 5 Aug 09:37 CMakeFiles
-rw-r--r-- 1 vinceieraci staff 387 5 Aug 09:37 CTestTestfile.cmake
-rw-r--r-- 1 vinceieraci staff 71821 5 Aug 09:37 build.ninja
-rw-r--r-- 1 vinceieraci staff 2034 5 Aug 09:37 cmake_install.cmake
-rw-r--r-- 1 vinceieraci staff 387 5 Aug 09:37 config.summary
drwxr-xr-x 3 vinceieraci staff 96 5 Aug 09:37 lib
drwxr-xr-x 6 vinceieraci staff 192 5 Aug 09:37 mysql
drwxr-xr-x 3 vinceieraci staff 96 5 Aug 09:37 plugins
-rw-r--r-- 1 vinceieraci staff 0 5 Aug 09:37 qtsqldrivers-config.h
-rw-r--r-- 1 vinceieraci staff 261 5 Aug 09:37 qtsqldrivers-config_p.h
drwxr-xr-x 6 vinceieraci staff 192 5 Aug 09:37 sqlite

Hence:

vinceieraci@Vinces-MBP2 build-sqldrivers % make 
make: *** No targets specified and no makefile found.  Stop.

[SGaist]

Since you are using the Ninja generator, you have to call ninja to build.

[Vince2480]

@SGaist I'm about give up, it's beyond my abilities.
I'll try again on an Intel machine.