qtbase-native: Force use of built-in pcre

If we specify neither -system-pcre nor -qt-pcre then qtbase will first see if it can find the pcre library in the system and fall back to compiling its own if that's not possible.

Unfortunately, this means that if qtbase-native happens to be built on a machine with system pcre available then the resulting binaries such as bin/qt5/uic in sstate files won't work correctly on machines that don't have pcre available. Even ignoring that, it doesn't help for packages to build differently depending on how the build system is configured.

We could depend on pcre-native and pass -system-pcre, but this doesn't work by default because qtbase actually requires pcre16 which is an optional (via PACKAGECONFIG) feature of pcre so the default there would need to be changed too.

So, let's make qtbase-native match the default of qtbase by passing -qt-pcre in order to ensure that qtbase-native is always built with its own pcre implementation.

Signed-off-by Mike Crowe <[email protected]>

---
 recipes-qt/qt5/qtbase-native_git.bb | 1 +
 1 file changed, 1 insertion(+)

recipes-qt/qt5/qtbase-native_git.bb +0 -0

index 54a0b78..0951ede 100644

Quoted 29 lines · Mike Crowe

If we specify neither -system-pcre nor -qt-pcre then qtbase will first see if it can find the pcre library in the system and fall back to compiling its own if that's not possible.

Unfortunately, this means that if qtbase-native happens to be built on a machine with system pcre available then the resulting binaries such as bin/qt5/uic in sstate files won't work correctly on machines that don't have pcre available. Even ignoring that, it doesn't help for packages to build differently depending on how the build system is configured.

We could depend on pcre-native and pass -system-pcre, but this doesn't work by default because qtbase actually requires pcre16 which is an optional (via PACKAGECONFIG) feature of pcre so the default there would need to be changed too.

So, let's make qtbase-native match the default of qtbase by passing -qt-pcre in order to ensure that qtbase-native is always built with its own pcre implementation.

Signed-off-by Mike Crowe <[email protected]>

---
 recipes-qt/qt5/qtbase-native_git.bb | 1 +
 1 file changed, 1 insertion(+)

recipes-qt/qt5/qtbase-native_git.bb +0 -0

index 54a0b78..0951ede 100644

recipes-qt/qt5/qtbase-native_git.bb PACKAGECONFIG_CONFARGS = " \ · line 52

Quoted 7 lines

recipes-qt/qt5/qtbase-native_git.bb +1 -0

@@ -46,6 +46,7 @@ PACKAGECONFIG_CONFARGS = " \
     -sysroot ${STAGING_DIR_NATIVE} \
     -no-gcc-sysroot \
     -system-zlib \
+    -qt-pcre \
     -no-libjpeg \
     -no-libpng \
     -no-gif \

Does anyone have any objections to this?

We've been using it for several weeks now and it's not caused any observed problems.

Thanks.

Mike.

Signature · 4 lines

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It's already merged:
https://github.com/meta-qt5/meta-qt5/commit/743b3b93e17f5382fd1f9f4e0d2932501c8a3c78