Allow e2fsprogs to be built using the clang (LLVM) frontend

Since clang uses C99 semantics by default, the main changes required
to allow clang to build e2fsprogs was to add support the C99 inline
semantics, while still allowing us to be built when the legacy (but
still default for gcc) GNU C89 inline semantics are in force.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
7 files changed