Removes checks for signal and set/longjmp, which are C89 (#798)

Also removes checks for setjmp.h and stddef.h

5 files changed, 9 insertions, 80 deletions

diff --git a/config/cmake/H5pubconf.h.in b/config/cmake/H5pubconf.h.in
index 107fe57..8a4db30 100644
--- a/config/cmake/H5pubconf.h.in
+++ b/config/cmake/H5pubconf.h.in
@@ -235,9 +235,6 @@
 /* Define to 1 if you have the `z' library (-lz). */
 #cmakedefine H5_HAVE_LIBZ @H5_HAVE_LIBZ@
 
-/* Define to 1 if you have the `longjmp' function. */
-#cmakedefine H5_HAVE_LONGJMP @H5_HAVE_LONGJMP@
-
 /* Define to 1 if you have the `lseek64' function. */
 #cmakedefine H5_HAVE_LSEEK64 @H5_HAVE_LSEEK64@
 
@@ -302,21 +299,12 @@
    compiled */
 #cmakedefine H5_HAVE_ROS3_VFD @H5_HAVE_ROS3_VFD@
 
-/* Define to 1 if you have the `setjmp' function. */
-#cmakedefine H5_HAVE_SETJMP @H5_HAVE_SETJMP@
-
-/* Define to 1 if you have the <setjmp.h> header file. */
-#cmakedefine H5_HAVE_SETJMP_H @H5_HAVE_SETJMP_H@
-
 /* Define to 1 if you have the `setsysinfo' function. */
 #cmakedefine H5_HAVE_SETSYSINFO @H5_HAVE_SETSYSINFO@
 
 /* Define to 1 if you have the `siglongjmp' function. */
 #cmakedefine H5_HAVE_SIGLONGJMP @H5_HAVE_SIGLONGJMP@
 
-/* Define to 1 if you have the `signal' function. */
-#cmakedefine H5_HAVE_SIGNAL @H5_HAVE_SIGNAL@
-
 /* Define to 1 if you have the `sigprocmask' function. */
 #cmakedefine H5_HAVE_SIGPROCMASK @H5_HAVE_SIGPROCMASK@
 
@@ -332,9 +320,6 @@
 /* Define if struct stat has the st_blocks field */
 #cmakedefine H5_HAVE_STAT_ST_BLOCKS @H5_HAVE_STAT_ST_BLOCKS@
 
-/* Define to 1 if you have the <stddef.h> header file. */
-#cmakedefine H5_HAVE_STDDEF_H @H5_HAVE_STDDEF_H@
-
 /* Define to 1 if you have the <stdlib.h> header file. */
 #cmakedefine H5_HAVE_STDLIB_H @H5_HAVE_STDLIB_H@
 
diff --git a/config/cmake_ext_mod/ConfigureChecks.cmake b/config/cmake_ext_mod/ConfigureChecks.cmake
index 7e1385a..f762a1f 100644
--- a/config/cmake_ext_mod/ConfigureChecks.cmake
+++ b/config/cmake_ext_mod/ConfigureChecks.cmake
@@ -72,7 +72,6 @@ if (WINDOWS)
   set (${HDF_PREFIX}_HAVE_WIN32_API 1)
   set (${HDF_PREFIX}_HAVE_LIBM 1)
   set (${HDF_PREFIX}_HAVE_STRDUP 1)
-  set (${HDF_PREFIX}_HAVE_LONGJMP 1)
   if (NOT MINGW)
     set (${HDF_PREFIX}_HAVE_GETHOSTNAME 1)
     set (${HDF_PREFIX}_HAVE_FUNCTION 1)
@@ -117,8 +116,6 @@ CHECK_INCLUDE_FILE_CONCAT ("sys/time.h"      ${HDF_PREFIX}_HAVE_SYS_TIME_H)
 CHECK_INCLUDE_FILE_CONCAT ("sys/types.h"     ${HDF_PREFIX}_HAVE_SYS_TYPES_H)
 CHECK_INCLUDE_FILE_CONCAT ("features.h"      ${HDF_PREFIX}_HAVE_FEATURES_H)
 CHECK_INCLUDE_FILE_CONCAT ("dirent.h"        ${HDF_PREFIX}_HAVE_DIRENT_H)
-CHECK_INCLUDE_FILE_CONCAT ("setjmp.h"        ${HDF_PREFIX}_HAVE_SETJMP_H)
-CHECK_INCLUDE_FILE_CONCAT ("stddef.h"        ${HDF_PREFIX}_HAVE_STDDEF_H)
 CHECK_INCLUDE_FILE_CONCAT ("unistd.h"        ${HDF_PREFIX}_HAVE_UNISTD_H)
 
 # Windows
@@ -483,9 +480,6 @@ CHECK_FUNCTION_EXISTS (rand_r            ${HDF_PREFIX}_HAVE_RAND_R)
 CHECK_FUNCTION_EXISTS (random            ${HDF_PREFIX}_HAVE_RANDOM)
 CHECK_FUNCTION_EXISTS (setsysinfo        ${HDF_PREFIX}_HAVE_SETSYSINFO)
 
-CHECK_FUNCTION_EXISTS (signal            ${HDF_PREFIX}_HAVE_SIGNAL)
-CHECK_FUNCTION_EXISTS (longjmp           ${HDF_PREFIX}_HAVE_LONGJMP)
-CHECK_FUNCTION_EXISTS (setjmp            ${HDF_PREFIX}_HAVE_SETJMP)
 CHECK_FUNCTION_EXISTS (siglongjmp        ${HDF_PREFIX}_HAVE_SIGLONGJMP)
 CHECK_FUNCTION_EXISTS (sigsetjmp         ${HDF_PREFIX}_HAVE_SIGSETJMP)
 CHECK_FUNCTION_EXISTS (sigprocmask       ${HDF_PREFIX}_HAVE_SIGPROCMASK)
@@ -503,11 +497,9 @@ CHECK_FUNCTION_EXISTS (waitpid           ${HDF_PREFIX}_HAVE_WAITPID)
 # sigsetjmp is special; may actually be a macro
 #-----------------------------------------------------------------------------
 if (NOT ${HDF_PREFIX}_HAVE_SIGSETJMP)
-  if (${HDF_PREFIX}_HAVE_SETJMP_H)
-    CHECK_SYMBOL_EXISTS (sigsetjmp "setjmp.h" ${HDF_PREFIX}_HAVE_MACRO_SIGSETJMP)
-    if (${HDF_PREFIX}_HAVE_MACRO_SIGSETJMP)
-      set (${HDF_PREFIX}_HAVE_SIGSETJMP 1)
-    endif ()
+  CHECK_SYMBOL_EXISTS (sigsetjmp "setjmp.h" ${HDF_PREFIX}_HAVE_MACRO_SIGSETJMP)
+  if (${HDF_PREFIX}_HAVE_MACRO_SIGSETJMP)
+    set (${HDF_PREFIX}_HAVE_SIGSETJMP 1)
   endif ()
 endif ()
 
diff --git a/configure.ac b/configure.ac
index cf1223b..75016ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1227,7 +1227,7 @@ AC_CHECK_LIB([dl], [dlopen])
 ## Unix
 AC_CHECK_HEADERS([sys/resource.h sys/time.h unistd.h sys/ioctl.h sys/stat.h])
 AC_CHECK_HEADERS([sys/socket.h sys/types.h sys/file.h])
-AC_CHECK_HEADERS([stddef.h setjmp.h features.h])
+AC_CHECK_HEADERS([features.h])
 AC_CHECK_HEADERS([dirent.h])
 AC_CHECK_HEADERS([netdb.h netinet/in.h arpa/inet.h])
 
@@ -2010,7 +2010,7 @@ AC_SEARCH_LIBS([clock_gettime], [rt posix4])
 AC_CHECK_FUNCS([alarm clock_gettime difftime fcntl flock fork frexpf])
 AC_CHECK_FUNCS([frexpl gethostname getrusage gettimeofday])
 AC_CHECK_FUNCS([lstat rand_r random setsysinfo])
-AC_CHECK_FUNCS([signal longjmp setjmp siglongjmp sigsetjmp sigprocmask])
+AC_CHECK_FUNCS([siglongjmp sigsetjmp sigprocmask])
 AC_CHECK_FUNCS([srandom strdup symlink])
 AC_CHECK_FUNCS([tmpfile asprintf vasprintf waitpid])
 
diff --git a/src/H5detect.c b/src/H5detect.c
index d148301..b2c0924 100644
--- a/src/H5detect.c
+++ b/src/H5detect.c
@@ -80,7 +80,7 @@ H5_GCC_DIAG_OFF("cast-align")
 #define H5SETJMP(buf)       HDsigsetjmp(buf, 1)
 #define H5LONGJMP(buf, val) HDsiglongjmp(buf, val)
 #define H5HAVE_SIGJMP       /* sigsetjmp/siglongjmp are supported. */
-#elif defined(H5_HAVE_LONGJMP)
+#else
 #define H5JMP_BUF           jmp_buf
 #define H5SETJMP(buf)       HDsetjmp(buf)
 #define H5LONGJMP(buf, val) HDlongjmp(buf, val)
@@ -149,12 +149,8 @@ static int          sigbus_handler_called_g  = 0; /* how many times called */
 static int          sigsegv_handler_called_g = 0; /* how many times called */
 static int          sigill_handler_called_g  = 0; /* how many times called */
 static int          signal_handler_tested_g  = 0; /* how many times tested */
-#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
-static int verify_signal_handlers(int signum, void (*handler)(int));
-#endif
-#ifdef H5JMP_BUF
-static H5JMP_BUF jbuf_g;
-#endif
+static int          verify_signal_handlers(int signum, void (*handler)(int));
+static H5JMP_BUF    jbuf_g;
 
 /*-------------------------------------------------------------------------
  * Function:    precision
@@ -388,7 +384,6 @@ precision(detected_t *d)
         COMP_ALIGN = (unsigned int)((char *)(&(s.x)) - (char *)(&s));                                        \
     }
 
-#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 #define ALIGNMENT(TYPE, INFO)                                                                                \
     {                                                                                                        \
         char *volatile _buf    = NULL;                                                                       \
@@ -435,15 +430,6 @@ precision(detected_t *d)
         HDsignal(SIGSEGV, _handler2); /*restore original handler*/                                           \
         HDsignal(SIGILL, _handler3);  /*restore original handler*/                                           \
     }
-#else
-#define ALIGNMENT(TYPE, INFO)                                                                                \
-    {                                                                                                        \
-        align_status_g |= STA_NoALIGNMENT;                                                                   \
-        (INFO.align) = 0;                                                                                    \
-    }
-#endif
-
-#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 
 /*-------------------------------------------------------------------------
  * Function:    sigsegv_handler
@@ -473,9 +459,6 @@ sigsegv_handler(int H5_ATTR_UNUSED signo)
     HDsignal(SIGSEGV, sigsegv_handler);
     H5LONGJMP(jbuf_g, SIGSEGV);
 }
-#endif
-
-#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 
 /*-------------------------------------------------------------------------
  * Function:    sigbus_handler
@@ -505,9 +488,6 @@ sigbus_handler(int H5_ATTR_UNUSED signo)
     HDsignal(SIGBUS, sigbus_handler);
     H5LONGJMP(jbuf_g, SIGBUS);
 }
-#endif
-
-#if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 
 /*-------------------------------------------------------------------------
  * Function:    sigill_handler
@@ -537,7 +517,6 @@ sigill_handler(int H5_ATTR_UNUSED signo)
     HDsignal(SIGILL, sigill_handler);
     H5LONGJMP(jbuf_g, SIGILL);
 }
-#endif
 
 /*-------------------------------------------------------------------------
  * Function:    print_results
@@ -777,21 +756,6 @@ done:\n\
         fprintf(rawoutstream, "/* Signal handlers verify test is not available */\n");
         /* The following is available in H5pubconf.h. Printing them here for */
         /* convenience. */
-#ifdef H5_HAVE_SIGNAL
-    fprintf(rawoutstream, "/* Signal() support: yes */\n");
-#else
-    fprintf(rawoutstream, "/* Signal() support: no */\n");
-#endif
-#ifdef H5_HAVE_SETJMP
-    fprintf(rawoutstream, "/* setjmp() support: yes */\n");
-#else
-    fprintf(rawoutstream, "/* setjmp() support: no */\n");
-#endif
-#ifdef H5_HAVE_LONGJMP
-    fprintf(rawoutstream, "/* longjmp() support: yes */\n");
-#else
-    fprintf(rawoutstream, "/* longjmp() support: no */\n");
-#endif
 #ifdef H5_HAVE_SIGSETJMP
     fprintf(rawoutstream, "/* sigsetjmp() support: yes */\n");
 #else
@@ -1568,7 +1532,6 @@ detect_alignments(void)
     na_g++;
 }
 
-#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 /* Verify the signal handler for signal signum works correctly multiple times.
  * One possible cause of failure is that the signal handling is blocked or
  * changed to SIG_DFL after H5LONGJMP.
@@ -1625,7 +1588,6 @@ verify_signal_handlers(int signum, void (*handler)(int))
         return 0;
     }
 }
-#endif
 
 /*-------------------------------------------------------------------------
  * Function:    main
@@ -1655,7 +1617,6 @@ main(int argc, char *argv[])
     if (!rawoutstream)
         rawoutstream = stdout;
 
-#if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
     /* verify the SIGBUS and SIGSEGV handlers work properly */
     if (verify_signal_handlers(SIGBUS, sigbus_handler) != 0) {
         fprintf(stderr, "Signal handler %s for signal %d failed\n", "sigbus_handler", SIGBUS);
@@ -1666,9 +1627,6 @@ main(int argc, char *argv[])
     if (verify_signal_handlers(SIGILL, sigill_handler) != 0) {
         fprintf(stderr, "Signal handler %s for signal %d failed\n", "sigill_handler", SIGILL);
     }
-#else
-    align_status_g |= STA_NoHandlerVerify;
-#endif
 
     print_header();
 
diff --git a/src/H5private.h b/src/H5private.h
index f90aa94..2478c2e 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -32,6 +32,7 @@
 #include <fcntl.h>
 #include <float.h>
 #include <math.h>
+#include <setjmp.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -63,13 +64,6 @@
 #endif
 
 /*
- * Longjumps are used to detect alignment constrants
- */
-#ifdef H5_HAVE_SETJMP_H
-#include <setjmp.h>
-#endif
-
-/*
  * flock() in sys/file.h is used for the implementation of file locking.
  */
 #if defined(H5_HAVE_FLOCK) && defined(H5_HAVE_SYS_FILE_H)