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build: Use -Wundef when possible

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This allows us to catch the use of undefined macros (that default to 0)
in preprocessor conditionals.

(cherry picked from commit 53ddc20fe9cd1400d18274e521932f84a4aecc5b)
This commit is contained in:
Damien Lespiau 2012-12-29 03:07:52 +00:00 committed by Robert Bragg
parent 3289fe03e8
commit f51f2459ac
1 changed files with 1 additions and 1 deletions
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configure.ac
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@ -310,7 +310,7 @@ AC_ARG_ENABLE(
MAINTAINER_COMPILER_FLAGS="-Wall -Wcast-align -Wuninitialized
-Wno-strict-aliasing -Wempty-body -Wformat
-Wformat-security -Winit-self
-Wformat-security -Winit-self -Wundef
-Wdeclaration-after-statement -Wvla
-Wpointer-arith -Wmissing-declarations"