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CVS commit: src/usr.bin/make

Module Name:    src
Committed By:   sjg
Date:           Mon Jun  4 20:34:21 UTC 2012

Modified Files:
        src/usr.bin/make: make.h util.c var.c

Log Message:
Var_UnExport() and setenv() can both realloc environ.
Use a common variable (savedEnv) to track that to avoid wasting memory.
Also, if providing setenv and unsetenv, do getenv too to ensure a consistent

To generate a diff of this commit:
cvs rdiff -u -r1.87 -r1.88 src/usr.bin/make/make.h
cvs rdiff -u -r1.51 -r1.52 src/usr.bin/make/util.c
cvs rdiff -u -r1.169 -r1.170 src/usr.bin/make/var.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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