Add AC_PROC_CC_C99 to configure.ac.
Define _POSIX_C_SOURCE to 200809L.
Replace gettimeofday, and timeval struct used with it, with POSIX
clock_gettime and timespec struct.
Replace XSI mode & S_IFMT, and S_IF* macros, with POSIX S_IS* macros.
* Use AS_HELP_STRING instead of deprecated AC_HELP_STRING
* Use AC_OUTPUT without arguments
* Enclose AC_INIT argument in brackets
* Add automake option std-options
(cherry picked from commit 53a33e1db2)
/bin/bash is not available on every system, nor always the default.
/bin/sh is standardised, but not always the preferred interactive shell,
hence it's configurable.
There's no need to check for the existence of this shell during config,
since it's an option that only affects run-time - and you may compile
ncdu on a totally different system than you would run it on.
Key 'b' in the browse window spawns a shell in the current directoy.
We first check the $SHELL environment variable of the user for the preferred
shell interpreter. If it's not set, we fall back to the compile time
configured default shell (usually /bin/bash).
Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
Ncurses provides a pkg-config module which could be used here. If not
available we fall back to the old detection heuristic.
Signed-off-by: Justin Lecher <jlec@gentoo.org>
