[Webkit-unassigned] [Bug 241030] New: [GTK][WPE] Error cross-compiling for a different target than the build host using the -DENABLE_INTROSPECTION=ON flag.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=241030

            Bug ID: 241030
           Summary: [GTK][WPE] Error cross-compiling for a different
                    target than the build host using the
                    -DENABLE_INTROSPECTION=ON flag.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: CMake
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: psaavedra at igalia.com

... in a cross-compilation setup, there is a deadlock leading in a build failure when  -DENABLE_INTROSPECTION=ON:


* Fail 1: The CMake rules find the g-ir-scanner in the Target rootfs of the toolchain. Then execution fails because the binary is not a binary of the host architecture:

```
Traceback (most recent call last):
  File "tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot/usr/bin/g-ir-scanner", line 98, in <module>
    from giscanner.scannermain import scanner_main
  File "tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot/usr/lib/gobject-introspection/giscanner/scannermain.py", line 35, in <module>
    from giscanner.ast import Include, Namespace
  File "tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot/usr/lib/gobject-introspection/giscanner/ast.py", line 29, in <module>
    from .sourcescanner import CTYPE_TYPEDEF, CSYMBOL_TYPE_TYPEDEF
  File "tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot/usr/lib/gobject-introspection/giscanner/sourcescanner.py", line 34, in <module>
    from giscanner._giscanner import SourceScanner as CSourceScanner
ImportError: tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot/usr/lib/gobject-introspection/giscanner/_giscanner.cpython-39-x86_64-linux-gnu.so: wrong ELF class: ELFCLASS32
```

Fail 2: The CMake rules find the  g-ir-scanner in the native sysrootfs for the build host but this fails during the execution because the WPEWebKit-1.0 library is built for the target architecture


```
tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/recipe-sysroot-native/usr/bin/g-ir-scanner --quiet --warn-all --warn-error --no-libtool --output=tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/wpewebkit-trunk+https999/WPEJavaScriptCore-1.0.gir --library=WPEWebKit-1.0 --library-path=tmp/work/cortexa9t2hf-neon-imx-poky-linux-gnueabi/wpewebkit/trunk+https999-r0/wpewebkit-trunk+https999/lib --namespace=WPEJavaScriptCore --nsversion=1.0 --c-include=jsc/jsc.h --identifier-prefix=JSC --symbol-prefix=jsc --pkg-export=wpe-javascriptcore-1.0 -DBUILDING_WebKit -DBUILDING_WITH_CMAKE=1 -DHAVE_CONFIG_H=1 -DPAS_BMALLOC=1 -DBUILDING_WPE__=1 -DGETTEXT_PACKAGE=\"WPE\" -DJSC_GLIB_API_ENABLED -DWEBKIT2_COMPILATION -DLIBDIR=\"/usr/lib\" -DPKGLIBDIR=\"/usr/lib/wpe-webkit-1.0\" -DPKGLIBEXECDIR=\"/usr/libexec/wpe-webkit-1.0\" -DDATADIR=\"/usr/share\" -DLOCALEDIR=\"/usr/share/locale\" -DSTATICALLY_LINKED_WITH_JavaScriptCore -DSTATICALLY_LINKED_WITH_WTF -DSTATICALLY_LINKED_WITH_bmalloc -DSTATICALLY_LINKED_WITH_PAL -DSTATICALLY_LINKED_WITH_WebCore  ...  workspace/sources/wpewebkit/Source/JavaScriptCore/API/glib/JSCWrapperMap.cpp
ERROR: can't resolve libraries to shared libraries: WPEWebKit-1.0
```


Related commit:

```
commit b0ae032850bb6b2672051bab8032fc9f9ef5eb97
Author: Adrian Perez de Castro <aperez at igalia.com>
Date:   Sat Apr 2 10:57:15 2022 +0000

    [GTK] Replace gtk-doc with gi-docgen
    https://bugs.webkit.org/show_bug.cgi?id=226662
```

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