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-rw-r--r--Library/Homebrew/extend/ENV.rb4
1 files changed, 2 insertions, 2 deletions
diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index 1edc4a64b..fc6bdd64b 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -35,8 +35,8 @@ module HomebrewEnvExtension
ENV['MAKEFLAGS']="-j#{Hardware.processor_count}"
unless HOMEBREW_PREFIX.to_s == '/usr/local'
- # /usr/local is always in the build system path so only add other paths
- ENV['CPPFLAGS'] = "-I#{HOMEBREW_PREFIX}/include"
+ # /usr/local is already an -isystem and -L directory so we skip it
+ ENV['CPPFLAGS'] = "-isystem #{HOMEBREW_PREFIX}/include"
ENV['LDFLAGS'] = "-L#{HOMEBREW_PREFIX}/lib"
else
# ignore existing build vars, thus we should have less bugs to deal with