From 4e24b69eaa2a2f4531a2732282a68ca113782784 Mon Sep 17 00:00:00 2001
From: "Joshua M. Doe" <oss@nvl.army.mil>
Date: Tue, 26 Sep 2017 09:28:29 -0400
Subject: [PATCH] build: allow GSTREAMER_ROOT to be set manually

---
 cmake/modules/FindGLIB2.cmake                 | 10 ++++++----
 cmake/modules/FindGObject.cmake               | 10 ++++++----
 cmake/modules/FindGStreamer.cmake             | 10 ++++++----
 cmake/modules/FindOrc.cmake                   | 10 ++++++----
 cmake/modules/MacroFindGStreamerLibrary.cmake | 10 ++++++----
 5 files changed, 30 insertions(+), 20 deletions(-)

diff --git a/cmake/modules/FindGLIB2.cmake b/cmake/modules/FindGLIB2.cmake
index 0fcb68d..d4e1db6 100644
--- a/cmake/modules/FindGLIB2.cmake
+++ b/cmake/modules/FindGLIB2.cmake
@@ -21,10 +21,12 @@ if (NOT WIN32)
    pkg_check_modules(PKG_GLIB REQUIRED glib-2.0)
 endif(NOT WIN32)
 
-if (CMAKE_SIZEOF_VOID_P MATCHES "8")
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
-else ()
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+if (NOT GSTREAMER_ROOT)
+    if (CMAKE_SIZEOF_VOID_P MATCHES "8")
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
+    else ()
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+    endif ()
 endif ()
 
 find_path(GLIB2_MAIN_INCLUDE_DIR glib.h
diff --git a/cmake/modules/FindGObject.cmake b/cmake/modules/FindGObject.cmake
index 54ede64..43787c0 100644
--- a/cmake/modules/FindGObject.cmake
+++ b/cmake/modules/FindGObject.cmake
@@ -28,10 +28,12 @@ IF (NOT WIN32)
    SET(GOBJECT_DEFINITIONS ${PKG_GOBJECT2_CFLAGS})
 ENDIF (NOT WIN32)
 
-if (CMAKE_SIZEOF_VOID_P MATCHES "8")
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
-else ()
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+if (NOT GSTREAMER_ROOT)
+    if (CMAKE_SIZEOF_VOID_P MATCHES "8")
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
+    else ()
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+    endif ()
 endif ()
 
 FIND_PATH(GOBJECT_INCLUDE_DIR gobject/gobject.h
diff --git a/cmake/modules/FindGStreamer.cmake b/cmake/modules/FindGStreamer.cmake
index 6a1323d..0e0ae17 100644
--- a/cmake/modules/FindGStreamer.cmake
+++ b/cmake/modules/FindGStreamer.cmake
@@ -38,10 +38,12 @@ if (PKG_CONFIG_FOUND)
                  OUTPUT_VARIABLE PKG_GSTREAMER_PLUGIN_DIR)
 endif()
 
-if (CMAKE_SIZEOF_VOID_P MATCHES "8")
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
-else ()
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+if (NOT GSTREAMER_ROOT)
+    if (CMAKE_SIZEOF_VOID_P MATCHES "8")
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
+    else ()
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+    endif ()
 endif ()
 
 find_library(GSTREAMER_LIBRARY
diff --git a/cmake/modules/FindOrc.cmake b/cmake/modules/FindOrc.cmake
index a759696..5a6e2ed 100644
--- a/cmake/modules/FindOrc.cmake
+++ b/cmake/modules/FindOrc.cmake
@@ -16,10 +16,12 @@ if (NOT WIN32)
    pkg_check_modules(PKG_ORC REQUIRED orc-0.4)
 endif(NOT WIN32)
 
-if (CMAKE_SIZEOF_VOID_P MATCHES "8")
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
-else ()
-    set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+if (NOT GSTREAMER_ROOT)
+    if (CMAKE_SIZEOF_VOID_P MATCHES "8")
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
+    else ()
+        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+    endif ()
 endif ()
 
 find_path(ORC_INCLUDE_DIR orc/orc.h
diff --git a/cmake/modules/MacroFindGStreamerLibrary.cmake b/cmake/modules/MacroFindGStreamerLibrary.cmake
index 76bc3e1..3f0cda2 100644
--- a/cmake/modules/MacroFindGStreamerLibrary.cmake
+++ b/cmake/modules/MacroFindGStreamerLibrary.cmake
@@ -20,10 +20,12 @@ macro(find_gstreamer_library _name _header _abi_version)
         pkg_check_modules(PKG_GSTREAMER_${_upper_name} gstreamer-${_lower_name}-${_abi_version})
     endif()
 
-    if (CMAKE_SIZEOF_VOID_P MATCHES "8")
-        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
-    else ()
-        set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+    if (NOT GSTREAMER_ROOT)
+        if (CMAKE_SIZEOF_VOID_P MATCHES "8")
+            set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86_64})
+        else ()
+            set(GSTREAMER_ROOT $ENV{GSTREAMER_1_0_ROOT_X86})
+        endif ()
     endif ()
     
     find_library(GSTREAMER_${_upper_name}_LIBRARY