diff options
Diffstat (limited to 'src/config.h.in')
| -rw-r--r-- | src/config.h.in | 44 |
1 files changed, 38 insertions, 6 deletions
diff --git a/src/config.h.in b/src/config.h.in index b4673c9..1dcbf68 100644 --- a/src/config.h.in +++ b/src/config.h.in @@ -1604,9 +1604,11 @@ #undef REPLACE_VASNPRINTF /* File name of the Bourne shell. */ -#if defined __CYGWIN__ -/* Omit the directory part because for 32-bit Cygwin programs in a - 64-bit Cygwin environment, the Cygwin mounts are not visible. */ +#if defined __CYGWIN__ || defined __ANDROID__ +/* Omit the directory part because + - For 32-bit Cygwin programs in a 64-bit Cygwin environment, the Cygwin + mounts are not visible. + - On Android, /bin/sh does not exist. It's /system/bin/sh instead. */ # define BOURNE_SHELL "sh" #else # define BOURNE_SHELL "/bin/sh" @@ -1833,10 +1835,13 @@ /* The _Noreturn keyword of C11. */ #ifndef _Noreturn -# if 201103 <= (defined __cplusplus ? __cplusplus : 0) +# if (defined __cplusplus \ + && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \ + || (defined _MSC_VER && 1900 <= _MSC_VER))) # define _Noreturn [[noreturn]] -# elif (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \ - || 4 < __GNUC__ + (7 <= __GNUC_MINOR__)) +# elif ((!defined __cplusplus || defined __clang__) \ + && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \ + || 4 < __GNUC__ + (7 <= __GNUC_MINOR__))) /* _Noreturn works as-is. */ # elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C # define _Noreturn __attribute__ ((__noreturn__)) @@ -1879,6 +1884,33 @@ /* Define to 1 if the system <stdint.h> predates C++11. */ #undef __STDC_LIMIT_MACROS +/* The _GL_ASYNC_SAFE marker should be attached to functions that are + signal handlers (for signals other than SIGABRT, SIGPIPE) or can be + invoked from such signal handlers. Such functions have some restrictions: + * All functions that it calls should be marked _GL_ASYNC_SAFE as well, + or should be listed as async-signal-safe in POSIX + <http://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04> + section 2.4.3. Note that malloc(), sprintf(), and fwrite(), in + particular, are NOT async-signal-safe. + * All memory locations (variables and struct fields) that these functions + access must be marked 'volatile'. This holds for both read and write + accesses. Otherwise the compiler might optimize away stores to and + reads from such locations that occur in the program, depending on its + data flow analysis. For example, when the program contains a loop + that is intended to inspect a variable set from within a signal handler + while (!signal_occurred) + ; + the compiler is allowed to transform this into an endless loop if the + variable 'signal_occurred' is not declared 'volatile'. + Additionally, recall that: + * A signal handler should not modify errno (except if it is a handler + for a fatal signal and ends by raising the same signal again, thus + provoking the termination of the process). If it invokes a function + that may clobber errno, it needs to save and restore the value of + errno. */ +#define _GL_ASYNC_SAFE + + /* Define to empty if `const' does not conform to ANSI C. */ #undef const |