From: Joel Rosdahl <joel@rosdahl.net>
Date: Tue, 6 Jun 2023 19:42:12 +0000 (+0200)
Subject: fix: Don't pass -v to the preprocessor
X-Git-Tag: v4.8.2~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d84d5334ee381fdd0996d3e425d254637f06aa45;p=thirdparty%2Fccache.git

fix: Don't pass -v to the preprocessor

The -v option tells the compiler to print various diagnostics to stdout,
including randomly generated filenames. When ccache calls the
preprocessor and -v is on the command line, the random information will
become part of the input hash, making the preprocessor mode always
produce cache misses.

Fix this by only passing -v when compiling, not preprocessing.

Closes #1293.
---

diff --git a/src/compopt.cpp b/src/compopt.cpp
index a7ec8b22c..f381c75e0 100644
--- a/src/compopt.cpp
+++ b/src/compopt.cpp
@@ -151,6 +151,7 @@ const CompOpt compopts[] = {
   {"-stdlib=", AFFECTS_CPP | TAKES_CONCAT_ARG},
   {"-trigraphs", AFFECTS_CPP},
   {"-u", TAKES_ARG | TAKES_CONCAT_ARG},
+  {"-v", AFFECTS_COMP},
   {"-z", TAKES_ARG | TAKES_CONCAT_ARG | AFFECTS_COMP},
 };