autogen.sh has a check for the libtool binary as a mean to
check if libtool is available. But distributions like Debian and
Ubuntu are splitting the libtool package, and the libtool binary is now
in a separate package. What autoconf actually need is not the libtool
binary, but libtoolize and other macro files. So check for libtoolize
instead. On the other hand, OSX only ships libtool, not libtoolize,
and uses a pre-generated libtool script to build. So check for
libtoolize first and then for libtool, and fail if neither can be
found.
- Added a macro for checking clang compiler
- Moved basic compiler checks to a macro
- Added a macro for checking if compiler supports a flag
- Added --enable-debug flag
- Added a macro for running normal autoconf check with compiler flags
- Added a macro for checking for verbose flag for different compilers (-Wall)
- Added a macro for turning on strict standards compliance
- Added a macro for turning warnings to errors
- Added a macro for checking if compiler supports given pragma
- Most of the flags now go through checks if the compilers supports them
rather than enumerating different compilers
- Added DSO symbol visibility for sun compiler
- Enabled verbose mode for sun compiler
- Fixed build for ICC 12.x by adding -wd279 to size_t checks
- Removed pkg-config checks as those don't seem to be used anywhere
Signed-off-by: Mikko Koppanen <mkoppanen@php.net>
