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Daniel Kiper c894713836 configure: Set gnu99 C language standard by default 
Commit d5a32255d (misc: Make grub_strtol() "end" pointers have safer
const qualifiers) introduced "restrict" keyword into some functions
definitions. This keyword was introduced in C99 standard. However, some
compilers by default may use C89 or something different. This behavior
leads to the breakage during builds when c89 or gnu89 is in force. So,
let's set gnu99 C language standard for all compilers by default. This
way a bit random build issue will be fixed and the GRUB source will be
build consistently regardless of type and version of the compiler.

It was decided to use gnu99 C language standard because it fixes the
issue mentioned above and also provides some useful extensions which are
used here and there in the GRUB source. Potentially we can use gnu11
too. However, this may reduce pool of older compilers which can be used
to build the GRUB. So, let's live with gnu99 until we discover that we
strongly require a feature from newer C standard.

The user is still able to override C language standard using relevant
*_CFLAGS variables.

Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
2020-05-25 14:43:16 +02:00
asm-tests asm-tests/i386-pc: Check that movl is 5 bytes. 2016-09-28 20:31:04 +03:00
conf gettext: Restore patches to po/Makefile.in.in 2020-03-10 21:17:54 +01:00
docs docs/grub: Support for probing partition UUID on MSDOS disks 2020-05-15 15:27:58 +02:00
grub-core tpm: Rename function grub_tpm_log_event() to grub_tpm_measure() 2020-05-15 15:37:28 +02:00
include tpm: Rename function grub_tpm_log_event() to grub_tpm_measure() 2020-05-15 15:37:28 +02:00
po po: Fix replacement of %m in sed programs 2020-03-10 21:32:09 +01:00
tests syslinux: Fix syslinux_test in out-of-tree builds 2019-03-05 10:27:53 +01:00
themes/starfield Starfield theme. 2012-02-23 17:21:38 +01:00
unicode * unicode: Import Unicode 6.0 data. 2011-12-25 16:17:25 +01:00
util templates: Output a menu entry for firmware setup on UEFI FastBoot systems 2020-04-21 22:14:12 +02:00
.gitattributes gitattributes: Mark po/exclude.pot as binary so git won't try to diff nonprintables 2019-09-23 13:17:15 +02:00
.gitignore gitignore: Add a few forgotten file patterns 2020-05-15 15:06:21 +02:00
.travis.yml travis: Add Travis CI config file 2019-02-25 14:02:06 +01:00
acinclude.m4 Fix -nopie/-nopie check. 2017-01-30 19:38:55 +01:00
AUTHORS 2005-09-03 Yoshinori K. Okuji <okuji@enbug.org> 2005-09-03 16:54:27 +00:00
autogen.sh autogen: Replace -iname with -ipath in find command 2020-05-15 15:35:59 +02:00
bootstrap gnulib: Upgrade Gnulib and switch to bootstrap tool 2019-03-05 10:48:12 +01:00
bootstrap.conf gettext: Restore patches to po/Makefile.in.in 2020-03-10 21:17:54 +01:00
BUGS * BUGS: New file. 2011-01-11 00:06:01 +01:00
ChangeLog-2015 Autogenerate ChangeLog from git changelog. 2015-01-24 17:29:50 +01:00
config.h.in Remove libgcc dependency. 2015-03-03 20:50:37 +01:00
configure.ac configure: Set gnu99 C language standard by default 2020-05-25 14:43:16 +02:00
COPYING 2007-07-22 Yoshinori K. Okuji <okuji@enbug.org> 2007-07-21 23:32:33 +00:00
coreboot.cfg * coreboot.cfg: Add missing file. 2013-11-20 00:52:23 +01:00
geninit.sh automake commit without merge history 2010-05-06 11:34:04 +05:30
gentpl.py build: Fix GRUB i386-pc build with Ubuntu gcc 2020-03-31 12:17:02 +02:00
INSTALL INSTALL: Update configure example 2020-05-15 15:34:43 +02:00
linguas.sh linguas: Don't skip ko.po. 2017-02-04 00:06:57 +01:00
Makefile.am Makefile: Make libgrub.pp depend on config-util.h 2020-03-10 21:39:53 +01:00
Makefile.util.def templates: Output a menu entry for firmware setup on UEFI FastBoot systems 2020-04-21 22:14:12 +02:00
NEWS Release 2.04 2019-07-04 15:57:30 +02:00
README README: Remove dead link to the wiki 2015-11-06 04:31:23 +01:00
THANKS 2009-12-11 Robert Millan <rmh.grub@aybabtu.com> 2009-12-11 22:44:47 +00:00
TODO TODO: Remove obsolete link 2016-02-12 17:51:52 +01:00

README 

This is GRUB 2, the second version of the GRand Unified Bootloader.
GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more
robust, more powerful, and more portable.

See the file NEWS for a description of recent changes to GRUB 2.

See the file INSTALL for instructions on how to build and install the
GRUB 2 data and program files.

Please visit the official web page of GRUB 2, for more information.
The URL is <http://www.gnu.org/software/grub/grub.html>.

More extensive documentation is available in the Info manual,
accessible using 'info grub' after building and installing GRUB 2.

There are a number of important user-visible differences from the
first version of GRUB, now known as GRUB Legacy. For a summary, please
see:

  info grub Introduction 'Changes from GRUB Legacy'