[PATCH v4 2/2] BaseTools: Remove caret in NASM_INC macro

["PierreGondois" <pierre.gondois@arm.com>]

From: Pierre Gondois <pierre.gondois@arm.com>

NASM_INC contains the list of directory to include when using
the nasm assembler.

In nmake makefiles, a trailing backslash escapes the newline char
and replaces it with a space ' '. To have a literal trailing
backslash, it must be escaped with a caret '^'. This is not
necessary for GNU makefiles.

On windows platforms, for the NASM_INC macro, a caret escaping
a trailing a backslash was appended to the last included
folder regardless of the makefile type.
For instance, "/Include/" was replaced by "/Include/^\".

This is causing a build failure on windows platforms using
GNU makefiles since the caret '^' doesn't escape any chars in
GNU makefiles and is thus conserved.
"/Include^\" was replaced by "/Include\/" in nmake makefiles,
but remained "/Include/^\" in GNU makefiles.

This patch removes the caret '^' on the build using GNU makefiles.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
---

The changes can be seen at https://github.com/PierreARM/edk2/tree/720_BaseTools_Rationalise_makefile_generation_v4

 BaseTools/Source/Python/AutoGen/GenMake.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py b/BaseTools/Source/Python/AutoGen/GenMake.py
index f5d15c40ad3196e5ea56f375bec12c38d313c9ee..bbb3c29446f53fa7f2cb61a216a5b119f72c3fbc 100755
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -612,9 +612,10 @@ cleanlib:
                 IncludePath = self._INC_FLAG_['NASM'] + self.PlaceMacro(P, self.Macros)
                 if IncludePath.endswith(os.sep):
                     IncludePath = IncludePath.rstrip(os.sep)
-                # When compiling .nasm files, need to add a literal backslash at each path
-                # To specify a literal backslash at the end of the line, precede it with a caret (^)
-                if P == MyAgo.IncludePathList[-1] and os.sep == '\\':
+                # When compiling .nasm files, need to add a literal backslash at each path.
+                # In nmake makfiles, a trailing literal backslash must be escaped with a caret ('^').
+                # It is otherwise replaced with a space (' '). This is not necessary for GNU makfefiles.
+                if P == MyAgo.IncludePathList[-1] and self._Platform == WIN32_PLATFORM and self._FileType == NMAKE_FILETYPE:
                     IncludePath = ''.join([IncludePath, '^', os.sep])
                 else:
                     IncludePath = os.path.join(IncludePath, '')
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'