Commit 61f52a04 authored by Kean Johnston's avatar Kean Johnston
Browse files

[3119] Added a comment regarding autoconf macros used.

As per review added a comment about the use of $ac_header_preproc.
parent 43c72256
......@@ -754,6 +754,12 @@ CPPFLAGS_SAVED=$CPPFLAGS
dnl ac_header_preproc is an autoconf symbol (undocumented but stable) that
dnl is set if the pre-processor phase passes. Thus by adding a custom
dnl failure handler we can detect the difference between a header no existing
dnl (or not even passing the pre-processor phase) and a header file resulting
dnl in compilation failures.
if test "x$ac_header_preproc" = "xyes"; then
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