xiaoxiang781216 commented on a change in pull request #1436:
URL: https://github.com/apache/incubator-nuttx/pull/1436#discussion_r458533632
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File path: arch/arm/src/arm/Toolchain.defs
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@@ -92,7 +92,7 @@ endif
CC = $(CROSSDEV)gcc
CXX = $(CROSSDEV)g++
-CPP = $(CROSSDEV)gcc -E
+CPP = $(CROSSDEV)gcc -E -P -x c
Review comment:
Since C preprocessor is same as C++ preprocessor, so I think both will
be fine. But -x option is important if we want preprocess some non C/C++
file(e.g. link script or bash script). Without this option, gcc will complain
the unknown format.
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