* configure.in (CC_FOR_BUILD): Set to gcc whether

	cross-compiling or not.
	(CC): Add -isystem's for targ-include and libc/include when they
	do not already appear in CC.

1 files changed, 19 insertions, 0 deletions

diff --git a/newlib/README b/newlib/README
index e07d29b9c..c32a5f06e 100644
--- a/newlib/README
+++ b/newlib/README
@@ -158,6 +158,25 @@ you can use it to test your guesses on abbreviations--for example:
      % sh config.sub i786v
      Invalid configuration `i786v': machine `i786v' not recognized
 
+The Build, Host and Target Concepts in newlib
+=============================================
+
+The build, host and target concepts are defined for gcc as follows:
+
+build: the platform on which gcc is built.
+host: the platform on which gcc is run.
+target: the platform for which gcc generates code.
+
+Since newlib is a library, the target concept does not apply to it, and the
+build, host, and target options given to the top-level configure script must
+be changed for newlib's use.
+
+The options are shifted according to these correspondences:
+
+gcc's build platform has no equivalent in newlib.
+gcc's host platform is newlib's build platform.
+gcc's target platform is newlib's host platform.
+and as mentioned before, newlib has no concept of target.
 
 `configure' options
 ===================