From 8fdf08c097edadd134dc36cc80b4b557cddbfea8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Sch=C3=BCrmann?= <daschuer@mixxx.org>
Date: Tue, 11 Sep 2018 15:24:20 +0200
Subject: IAR: Fix compiler id, version, and arch detection on 6.50.6

The IAR 6.50.6 compiler places extra/truncated copies of the
compiler id `INFO:` strings into binaries with a prefix like
`?<Constant "`.  Teach CMakeDetermineCompilerId to ignore them.

Fixes: #18333
---
 Modules/CMakeDetermineCompilerId.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index dc4d9be..5e2df26a 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -525,6 +525,9 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
       ${CMAKE_${lang}_COMPILER_ID_STRINGS_PARAMETERS}
       REGEX "INFO:[A-Za-z0-9_]+\\[[^]]*\\]")
     set(COMPILER_ID_TWICE)
+    # With the IAR Compiler, some strings are found twice, first time as incomplete
+    # list like "?<Constant "INFO:compiler[IAR]">".  Remove the incomplete copies.
+    list(FILTER CMAKE_${lang}_COMPILER_ID_STRINGS EXCLUDE REGEX "\\?<Constant \\\"")
     # In C# binaries, some strings are found more than once.
     list(REMOVE_DUPLICATES CMAKE_${lang}_COMPILER_ID_STRINGS)
     foreach(info ${CMAKE_${lang}_COMPILER_ID_STRINGS})
-- 
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