cmake/toolchains: update default CROSS comment

the basis for most are Debian and similar package management systems.

Change-Id: I3adef707e6d4f8084c7074dbe7950cd1d02eab3f

build/cmake/toolchains/arm64-linux-gcc.cmake

diff --git a/build/cmake/toolchains/arm64-linux-gcc.cmake b/build/cmake/toolchains/arm64-linux-gcc.cmake
index a510524..133a96a 100644
--- a/build/cmake/toolchains/arm64-linux-gcc.cmake
+++ b/build/cmake/toolchains/arm64-linux-gcc.cmake
@@ -17,7 +17,8 @@
 
 if("${CROSS}" STREQUAL "")
 
-  # Default the cross compiler prefix to something known to work.
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS aarch64-linux-gnu-)
 endif()
 

build/cmake/toolchains/arm64-mingw-gcc.cmake

diff --git a/build/cmake/toolchains/arm64-mingw-gcc.cmake b/build/cmake/toolchains/arm64-mingw-gcc.cmake
index 5472ed4..7400423 100644
--- a/build/cmake/toolchains/arm64-mingw-gcc.cmake
+++ b/build/cmake/toolchains/arm64-mingw-gcc.cmake
@@ -17,6 +17,8 @@
 set(CMAKE_SYSTEM_NAME "Windows")
 
 if("${CROSS}" STREQUAL "")
+
+  # Default the cross compiler prefix to one used by MSYS2.
   set(CROSS aarch64-w64-mingw32-)
 endif()
 

build/cmake/toolchains/armv7-linux-gcc.cmake

diff --git a/build/cmake/toolchains/armv7-linux-gcc.cmake b/build/cmake/toolchains/armv7-linux-gcc.cmake
index 7ce1dd8..366e198 100644
--- a/build/cmake/toolchains/armv7-linux-gcc.cmake
+++ b/build/cmake/toolchains/armv7-linux-gcc.cmake
@@ -17,7 +17,8 @@
 
 if("${CROSS}" STREQUAL "")
 
-  # Default the cross compiler prefix to something known to work.
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS arm-linux-gnueabihf-)
 endif()
 

build/cmake/toolchains/armv7-mingw-gcc.cmake

diff --git a/build/cmake/toolchains/armv7-mingw-gcc.cmake b/build/cmake/toolchains/armv7-mingw-gcc.cmake
index 8a92891..93f8c065 100644
--- a/build/cmake/toolchains/armv7-mingw-gcc.cmake
+++ b/build/cmake/toolchains/armv7-mingw-gcc.cmake
@@ -17,6 +17,8 @@
 set(CMAKE_SYSTEM_NAME "Windows")
 
 if("${CROSS}" STREQUAL "")
+
+  # Default the cross compiler prefix to one used by MSYS2.
   set(CROSS armv7-w64-mingw32-)
 endif()
 

build/cmake/toolchains/ppc-linux-gcc.cmake

diff --git a/build/cmake/toolchains/ppc-linux-gcc.cmake b/build/cmake/toolchains/ppc-linux-gcc.cmake
index 5c5dfe5..3aa2652 100644
--- a/build/cmake/toolchains/ppc-linux-gcc.cmake
+++ b/build/cmake/toolchains/ppc-linux-gcc.cmake
@@ -17,7 +17,8 @@
 
 if("${CROSS}" STREQUAL "")
 
-  # Default the cross compiler prefix to something known to work.
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS powerpc64le-linux-gnu-)
 endif()
 

build/cmake/toolchains/riscv-linux-gcc.cmake

diff --git a/build/cmake/toolchains/riscv-linux-gcc.cmake b/build/cmake/toolchains/riscv-linux-gcc.cmake
index 5cdc9e4..4133be6 100644
--- a/build/cmake/toolchains/riscv-linux-gcc.cmake
+++ b/build/cmake/toolchains/riscv-linux-gcc.cmake
@@ -17,7 +17,8 @@
 
 if("${CROSS}" STREQUAL "")
 
-  # Default the cross compiler prefix to something known to work.
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS riscv64-linux-gnu-)
 endif()
 

build/cmake/toolchains/x86-mingw-gcc.cmake

diff --git a/build/cmake/toolchains/x86-mingw-gcc.cmake b/build/cmake/toolchains/x86-mingw-gcc.cmake
index f75728f..2208333 100644
--- a/build/cmake/toolchains/x86-mingw-gcc.cmake
+++ b/build/cmake/toolchains/x86-mingw-gcc.cmake
@@ -20,6 +20,9 @@
 set(CMAKE_EXE_LINKER_FLAGS_INIT "-m32")
 
 if("${CROSS}" STREQUAL "")
+
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS i686-w64-mingw32-)
 endif()
 

build/cmake/toolchains/x86_64-mingw-gcc.cmake

diff --git a/build/cmake/toolchains/x86_64-mingw-gcc.cmake b/build/cmake/toolchains/x86_64-mingw-gcc.cmake
index 56e9b6e..978146a 100644
--- a/build/cmake/toolchains/x86_64-mingw-gcc.cmake
+++ b/build/cmake/toolchains/x86_64-mingw-gcc.cmake
@@ -17,6 +17,9 @@
 set(CMAKE_SYSTEM_NAME "Windows")
 
 if("${CROSS}" STREQUAL "")
+
+  # Default the cross compiler prefix to one used by Debian and other package
+  # management systems.
   set(CROSS x86_64-w64-mingw32-)
 endif()