Cory Fields c546dc05bb autotools: fix subdir m4 check, never let it return -I ...

If BDB_CPPFLAGS returns only "-I", the next argument sent to the preprocessor
is treated as a path. There are 2 fixes here:

1. Check in CPPFLAGS, as a user might have manually passed a path to check.
2. Ensure the value is not empty before setting BDB_CPPFLAGS to "-I value"

2013-09-18 17:11:41 -04:00

602 B

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