Add support for building building against yocto

Using an environment prefix wrapper shell script that sources the SDK's
env setup. The script also ensure that we don't loose cmake on the way.

Change-Id: I9d08bc58f0efaf688512ab26a7ddb800309a5015
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

coin/instructions/call_target_cmake.yaml

@@ -1,7 +1,7 @@
 type: Group
 instructions:
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} {{.InstallDir}}\\target\\bin\\qt-cmake {{.Env.COIN_CMAKE_ARGS}}"
+    command: "{{.Env.TARGET_ENV_PREFIX}} {{.InstallDir}}\\target\\bin\\qt-cmake {{.Env.COIN_CMAKE_ARGS}}"
     executeCommandArgumentSplitingBehavior: SplitAfterVariableSubstitution
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
@@ -12,7 +12,7 @@ instructions:
       property: host.os
       equals_value: Windows
   - type: ExecuteCommand
-    command: "{{.InstallDir}}/target/bin/qt-cmake {{.Env.COIN_CMAKE_ARGS}}"
+    command: "{{.Env.TARGET_ENV_PREFIX}} {{.InstallDir}}/target/bin/qt-cmake {{.Env.COIN_CMAKE_ARGS}}"
     executeCommandArgumentSplitingBehavior: SplitAfterVariableSubstitution
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200

coin/instructions/cmake_cross_compilation_module_build_instructions.yaml

@@ -51,13 +51,13 @@ instructions:
     variableValue: "-DBUILD_TESTING=OFF {{.SourceDir}}"
   - !include "{{qt/qtbase}}/call_target_cmake.yaml"
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --build . --parallel -v"
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --build . --parallel -v"
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >
       Failed to build sources. In the current state bug can be everywhere.
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --install ."
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --install ."
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >
@@ -66,7 +66,7 @@ instructions:
     variableName: DESTDIR
     variableValue: "{{.InstallRoot}}"
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --install ."
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --install ."
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >

coin/instructions/cmake_cross_compilation_qtbase_build_instructions.yaml

@@ -50,20 +50,20 @@ instructions:
   - type: ChangeDirectory
     directory: "{{.BuildDir}}"
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake {{.Env.TARGET_CONFIGURE_ARGS}} -DQT_HOST_PATH={{.InstallDir}}/host -DCMAKE_INSTALL_PREFIX:PATH={{.InstallDir}}/target -DBUILD_TESTING=OFF {{.SourceDir}}"
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake {{.Env.TARGET_CONFIGURE_ARGS}} -DQT_HOST_PATH={{.InstallDir}}/host -DCMAKE_INSTALL_PREFIX:PATH={{.InstallDir}}/target -DBUILD_TESTING=OFF {{.SourceDir}}"
     executeCommandArgumentSplitingBehavior: SplitAfterVariableSubstitution
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >
       Failed to call cmake.
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --build . --parallel -v"
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --build . --parallel -v"
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >
       Failed to build sources. In the current state bug can be everywhere.
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --install ."
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --install ."
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >
@@ -72,7 +72,7 @@ instructions:
     variableName: DESTDIR
     variableValue: "{{.InstallRoot}}"
   - type: ExecuteCommand
-    command: "{{.Env.ENV_PREFIX}} cmake --install ."
+    command: "{{.Env.TARGET_ENV_PREFIX}} cmake --install ."
     maxTimeInSeconds: 6000
     maxTimeBetweenOutput: 1200
     userMessageOnFailure: >

coin/instructions/prepare_building_env.yaml

@@ -200,3 +200,30 @@ instructions:
         condition: property
         property: host.os
         equals_value: Windows
+
+  - type: Group
+    instructions:
+    - type: WriteFile
+      fileContents: "#!/bin/bash\nunset LD_LIBRARY_PATH\n. {{.Env.QT_YOCTO_ENVSETUP}}\nexport PATH={{.Env.QT_CMAKE_DIR}}:$PATH;\n$*"
+      filename: "{{.Env.HOME}}/prefix.sh"
+      fileMode: 493
+      maxTimeInSeconds: 20
+      maxTimeBetweenOutput: 20
+      enable_if:
+        condition: property
+        property: target.osVersion
+        equals_value: QEMU
+    - type: EnvironmentVariable
+      variableName: TARGET_ENV_PREFIX
+      variableValue: "{{.Env.HOME}}/prefix.sh"
+      enable_if:
+        condition: property
+        property: target.osVersion
+        equals_value: QEMU
+    - type: EnvironmentVariable
+      variableName: TARGET_ENV_PREFIX
+      variableValue: ""
+      disable_if:
+        condition: property
+        property: target.osVersion
+        equals_value: QEMU