Normalization include:
- Use dnl for everything that can be ommitted when configure is built in
favor of the shell comment character # which is visible in the output.
- Line length normalized to 80 columns
- Dots for most of the one line sentences
- Macro definitions include similar pattern header comments now
Autoconf 2.50 released in 2001 made several macros obsolete including
the AC_TRY_RUN, AC_TRY_COMPILE and AC_TRY_LINK:
http://git.savannah.gnu.org/cgit/autoconf.git/tree/ChangeLog.2
These macros should be replaced with the current AC_FOO_IFELSE instead:
- AC_TRY_RUN with AC_RUN_IFELSE and AC_LANG_SOURCE
- AC_TRY_LINK with AC_LINK_IFELSE and AC_LANG_PROGRAM
- AC_TRY_COMPILE with AC_COMPILE_IFELSE and AC_LANG_PROGRAM
PHP 5.4 to 7.1 require Autoconf 2.59+ version, PHP 7.2 and above require
2.64+ version, and the PHP 7.2 phpize script requires 2.59+ version which
are all greater than above mentioned 2.50 version therefore systems
should be well supported by now.
This patch was created with the help of autoupdate script:
autoupdate <file>
Reference docs:
- https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Obsolete-Macros.html
- https://www.gnu.org/software/autoconf/manual/autoconf-2.59/autoconf.pdf
Some editors utilizing .editorconfig automatically trim whitespaces. For
convenience this patch removes whitespaces in certain build files:
- ext/*/config*.m4
- configure.ac
- acinclude.m4
The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.
In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.
This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.
When the user passes --with-db4=DIR to ./configure, the directory DIR
is searched for a number of paths in order of preference. These paths
contain possible locations for Berkeley DB (BDB) to be installed, and
since PHP only supports BDB-4.x and BDB-5.x, it's important that (for
example) version 5.1 be autodetected before falling back to
/usr/include/db.h which can point to BDB-6.x.
The newer BDB-5.3 works with PHP, and if only BDB-5.3 is installed on
the user's system, the current ./configure script is fine. However, if
both BDB-5.3 and BDB-6.0 are installed, version 5.3 is not
autodetected, causing BDB-6.0 to be used. The ./configure step then fails.
This commit adds autodetection for BDB-5.3, and fixes a bug reported
on Gentoo at https://bugs.gentoo.org/show_bug.cgi?id=564824.
# Most probably db4 requires a slightly different detection since functions
# are macros which most probably doesn't work with current configure check.
