Merge branch '3.2-maint'

* 3.2-maint:
  Include strings.h for strcasecmp
  Remove unnecessary extra_cppflags, extra_ldflags and all_ldflags variables
  Improve signal handling
  Wait for compiler subprocess to exit before exiting from a signal
  Make conversion-to-bool explicit to avoid warnings on legacy systems
  Fix regression in recent change related to zlib in nonstandard location

Conflicts:
	NEWS.txt

diff --cc NEWS.txt
index f2898ad1003295b619adadf257ef5024f56a09fd,f979e708f8be86ceb25653567597b5ce95642d47..38d51768cf034376898dcb66be0978aa25efccbc
--- 1/NEWS.txt
--- 2/NEWS.txt
+++ b/NEWS.txt
@@@ -2,19 -2,22 +2,35 @@@ ccache new
  ===========
  
  
 +Unreleased 3.3
 +--------------
 +
 +New features and improvements
 +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 +
 +- Added support for cuda including the -optf/--options-file option.
 +
 +
 +Bug fixes
 +~~~~~~~~~
 +
 +
+ Unreleased 3.2.4
+ ----------------
+ 
+ Bug fixes
+ ~~~~~~~~~
+ 
+ - Fixed build error related to zlib on systems with older make versions
+   (regression in ccache 3.2.3).
+ 
+ - Made conversion-to-bool explicit to avoid build warnings (and potential
+   runtime errors) on legacy systems.
+ 
+ - Improved signal handling: Kill compiler on SIGTERM; wait for compiler to exit
+   before exiting; die appropriately.
+ 
+ 
  ccache 3.2.3
  ------------
  Release date: 2015-08-16

diff --cc ccache.c
Simple merge

diff --cc language.c
Simple merge