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When cross compiling for macOS with depends, we do not compile with dbus.

Though, bitcoin_qt.m4 checks via pkg-config for a Qt5DBUS.pc on the host. If the host has a qt5_dbus system library (regardless of if the depends qt library set), USE_DBUS gets enabled (but is actually not compiled via depends) leading to compile errors.

This fixes the error by always avoiding DBUS notification on macOS.

Another (eventually better) way to fix this would be to avoid detection of host qt pkg-config packages when cross compiling.

@jonasschnelli jonasschnelli force-pushed the 2020/01/mac_dbus branch 2 times, most recently from eed80ec to 7ef6d87 Compare January 31, 2020 16:10
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Closing in favor of #18045

laanwj added a commit that referenced this pull request Feb 10, 2020
0e519fe build: Fix behavior when ALLOW_HOST_PACKAGES unset (Hennadii Stepanov)

Pull request description:

  On master (f05c1ac) during building with depends host packages are always considered by `pkg-config` regardless of `ALLOW_HOST_PACKAGES` environment variable. This causes issues like #18042.

  This is an alternative to #18042 and #18045.

  On master:
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

  ---

  With this PR:
  1) `ALLOW_HOST_PACKAGES` unset
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... no
  ...
  checking whether to build GUI with support for D-Bus... no
  ...
  ```
  2) `ALLOW_HOST_PACKAGES=1`
  ```
  $ make HOST=x86_64-apple-darwin16 ALLOW_HOST_PACKAGES=1 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

ACKs for top commit:
  jonasschnelli:
    Tested ACK 0e519fe - After this PR (and after a `make clean` & `make HOST=x86_64-apple-darwin16` in depends), the macOS depends build on a Debian machine with qt as host package worked (it fails on master due to `ENABLE_DBUS=1`).

Tree-SHA512: d11e1c2bc8ce8a07f3f9b465b01c9b2c814afe75b085a8b88aab74fd3a922aa98180c447457dfc4174515513181c5f4edc521978a1d3d0a112106c98b5c73c0e
sidhujag pushed a commit to syscoin/syscoin that referenced this pull request Feb 18, 2020
0e519fe build: Fix behavior when ALLOW_HOST_PACKAGES unset (Hennadii Stepanov)

Pull request description:

  On master (f05c1ac) during building with depends host packages are always considered by `pkg-config` regardless of `ALLOW_HOST_PACKAGES` environment variable. This causes issues like bitcoin#18042.

  This is an alternative to bitcoin#18042 and bitcoin#18045.

  On master:
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

  ---

  With this PR:
  1) `ALLOW_HOST_PACKAGES` unset
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... no
  ...
  checking whether to build GUI with support for D-Bus... no
  ...
  ```
  2) `ALLOW_HOST_PACKAGES=1`
  ```
  $ make HOST=x86_64-apple-darwin16 ALLOW_HOST_PACKAGES=1 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

ACKs for top commit:
  jonasschnelli:
    Tested ACK 0e519fe - After this PR (and after a `make clean` & `make HOST=x86_64-apple-darwin16` in depends), the macOS depends build on a Debian machine with qt as host package worked (it fails on master due to `ENABLE_DBUS=1`).

Tree-SHA512: d11e1c2bc8ce8a07f3f9b465b01c9b2c814afe75b085a8b88aab74fd3a922aa98180c447457dfc4174515513181c5f4edc521978a1d3d0a112106c98b5c73c0e
sidhujag pushed a commit to syscoin-core/syscoin that referenced this pull request Nov 10, 2020
0e519fe build: Fix behavior when ALLOW_HOST_PACKAGES unset (Hennadii Stepanov)

Pull request description:

  On master (f05c1ac) during building with depends host packages are always considered by `pkg-config` regardless of `ALLOW_HOST_PACKAGES` environment variable. This causes issues like bitcoin#18042.

  This is an alternative to bitcoin#18042 and bitcoin#18045.

  On master:
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

  ---

  With this PR:
  1) `ALLOW_HOST_PACKAGES` unset
  ```
  $ make HOST=x86_64-apple-darwin16 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... no
  ...
  checking whether to build GUI with support for D-Bus... no
  ...
  ```
  2) `ALLOW_HOST_PACKAGES=1`
  ```
  $ make HOST=x86_64-apple-darwin16 ALLOW_HOST_PACKAGES=1 -C depends
  $ CONFIG_SITE=$PWD/depends/x86_64-apple-darwin16/share/config.site ./configure
  ...
  checking for QT_DBUS... yes
  ...
  checking whether to build GUI with support for D-Bus... yes
  ...
  ```

ACKs for top commit:
  jonasschnelli:
    Tested ACK 0e519fe - After this PR (and after a `make clean` & `make HOST=x86_64-apple-darwin16` in depends), the macOS depends build on a Debian machine with qt as host package worked (it fails on master due to `ENABLE_DBUS=1`).

Tree-SHA512: d11e1c2bc8ce8a07f3f9b465b01c9b2c814afe75b085a8b88aab74fd3a922aa98180c447457dfc4174515513181c5f4edc521978a1d3d0a112106c98b5c73c0e
@bitcoin bitcoin locked as resolved and limited conversation to collaborators Feb 15, 2022
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