fixup Perl_magic_freemglob()

[perl5.git] / Configure

diff --git a/Configure b/Configure
index 16d6370..71092ea 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -514,6 +514,7 @@ d_gai_strerror=''
 d_Gconvert=''
 d_getaddrinfo=''
 d_getcwd=''
+d_getenv_preserves_other_thread=''
 d_getespwnam=''
 d_getfsstat=''
 d_getgrent=''
@@ -1833,8 +1834,8 @@ Usage: $me [-dehrsEKOSV] [-f config.sh] [-D symbol] [-D symbol=value]
   -r : reuse C symbols value if possible (skips costly nm extraction).
   -s : silent mode, only echoes questions and essential information.
   -D : define symbol to have some value:
-         -D symbol         symbol gets the value 'define'
-         -D symbol=value   symbol gets the value 'value'
+         -D symbol                symbol gets the value 'define'
+         -D symbol='some value'   symbol is set to 'some value'
        common used examples (see INSTALL for more info):
          -Duse64bitint            use 64bit integers
          -Duse64bitall            use 64bit integers and pointers
@@ -6893,9 +6894,9 @@ int main() {
      * The Motorola 68881 had another "extended precision" format:
      * sign:1 exp:15 zero:16 integer:1 mantissa:63
      * for total of 96 bits of bytes.  The zero bits were unused.
-     * See "M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL" for more details.
-     * If it ever becomes relevant, this format should be allocated
-     * a new doublekind code since it's quite different from the Intel x87.
+     * See "M68000 FAMILY PROGRAMMER'S REFERENCE MANUAL" for more details.
+     * If it ever becomes relevant, this format should be allocated a
+     * new doublekind code since it is quite different from the Intel x87.
      */
     printf("4\n");
     exit(0);
@@ -10373,6 +10374,15 @@ void checkit(const char *expect, char *got)
        }
 }
 
+void lencheck(int expect, int got)
+{
+    if (expect != got) {
+               printf("%s length mismatch:  Expected %d, got %d\n",
+                       myname, expect, got);
+               exit(1);
+       }
+}
+
 int main()
 {
        char buf[64];
@@ -10445,6 +10455,12 @@ int main()
        else
            checkit("1e+34", buf);
 
+       /* Test for an Ubuntu/Debian bug in gcvt and qgcvt. See:        *
+        * https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899553 */
+
+       Gconvert((DOUBLETYPE)0.4, 53, 0, buf);
+       lencheck(55, (int)strlen(buf));
+
        /* For Perl, if you add additional tests here, also add them to
         * t/base/num.t for benefit of platforms not using Configure or
         * overriding d_Gconvert */
@@ -14206,6 +14222,86 @@ eval $inlibc
 set getcwd d_getcwd
 eval $inlibc
 
+: check for getenv behavior
+case "$d_getenv_preserves_other_thread" in
+'')
+$echo "Checking to see if getenv() preserves a different thread's results" >&4
+$cat >try.c <<EOCP
+#$i_stdlib I_STDLIB
+#ifdef I_STDLIB
+#  include <stdlib.h>
+#endif
+#include <stdio.h>
+#include <string.h>
+#$i_pthread I_PTHREAD
+#ifdef I_PTHREAD
+#  include <pthread.h>
+#endif
+
+void *
+thread_start(void * arg)
+{
+    (void *) getenv("HOME");
+}
+
+int main() {
+    char * main_buffer;
+    char save_main_buffer[1000];
+    pthread_t subthread;
+    pthread_attr_t attr;
+
+    main_buffer = getenv("PATH");
+
+    /* If too large for our generous allowance, return we couldn't figure it
+     * out. */
+    if (strlen(main_buffer) >= sizeof(save_main_buffer)) {
+        exit(2);
+    }
+
+    strcpy(save_main_buffer, main_buffer);
+
+    if (pthread_attr_init(&attr) != 0) {
+        exit(2);
+    }
+
+    if (pthread_create(&subthread, &attr, thread_start, NULL) != 0) {
+        exit(2);
+    }
+
+    if (pthread_join(subthread, NULL) != 0) {
+        exit(2);
+    }
+
+    exit(! strcmp(main_buffer, save_main_buffer) == 0);
+}
+EOCP
+val=
+set try
+if eval $compile_ok; then
+    $run ./try
+    rc=$?
+    case "$rc" in
+       0) echo "getenv() didn't destroy another thread's buffer" >&4
+          val=$define
+          ;;
+       1) echo "getenv() does destroy another thread's buffer" >&4
+          val=$undef
+          ;;
+       *) echo "Couldn't determine if getenv() destroys another thread's return value (code=$rc); assuming it does" >&4
+          val=$undef
+          ;;
+    esac
+else
+    echo "(I can't seem to compile the test program.)" >&4
+    echo "Assuming that your C library's getenv destroys another thread's return value." >&4
+    val=$undef
+fi
+set d_getenv_preserves_other_thread
+eval $setvar
+$rm_try
+;;
+esac
+
 : see if getespwnam exists
 set getespwnam d_getespwnam
 eval $inlibc
@@ -24251,6 +24347,7 @@ d_gdbm_ndbm_h_uses_prototypes='$d_gdbm_ndbm_h_uses_prototypes'
 d_gdbmndbm_h_uses_prototypes='$d_gdbmndbm_h_uses_prototypes'
 d_getaddrinfo='$d_getaddrinfo'
 d_getcwd='$d_getcwd'
+d_getenv_preserves_other_thread='$d_getenv_preserves_other_thread'
 d_getespwnam='$d_getespwnam'
 d_getfsstat='$d_getfsstat'
 d_getgrent='$d_getgrent'