This commit makes it possible to build ModSecurity on systems where
/bin/sh is a POSIX-compliant shell that is not Bash. Debian, Alpine
Linux, and Gentoo Linux with the system shell set to not Bash, are
examples of such systems.
Previously, the helper macros contained two types of Bashisms:
* The '==' comparison operator. Very easy to change, as the proper
POSIX-compliant form is '='. For example:
if test "${var}" == "myvalue" -> if test "${var}" = "myvalue"
* The '-a' (and) operator in the 'test' builtin. The '-a' and '-o'
operators were removed in POSIX 2024 (Issue 8). The correct form
is to use the '&&' and '||' operators respectively. For instance:
if test -d "${var}" -a -r "${var}/file" ->
if test -d "${var}" && test -r "${var}/file"
Bug: https://bugs.gentoo.org/887135
Signed-off-by: Zurab Kvachadze <zurabid2016@gmail.com>
When searching for YAJL during ./configure, pkg-config is checked first,
and then a list of directories is searched if pkg-config bears no fruit.
The previous version of yajl.m4 was looping over YAJL_POSSIBLE_LIB_NAMES
instead of YAJL_POSSIBLE_PATHS and passing the lib name to the
CHECK_FOR_YAJL_AT() function instead of the path. The would lead to YAJL
never being found if pkg-config could not find it.
