#
-# Check for <inttypes.h>
+# It became apparent at some point that using a suitable C99 compiler does not
+# automatically mean snprintf(3) implementation in the libc supports all the
+# modifiers and specifiers used in the project, so let's test that before the
+# build, not after.
#
-for ac_header in inttypes.h
-do :
- ac_fn_c_check_header_mongrel "$LINENO" "inttypes.h" "ac_cv_header_inttypes_h" "$ac_includes_default"
-if test "x$ac_cv_header_inttypes_h" = xyes; then :
- cat >>confdefs.h <<_ACEOF
-#define HAVE_INTTYPES_H 1
-_ACEOF
-
- #
- # OK, we have inttypes.h, but does it define all the PRI[doxu]64 macros?
- # Some systems have an inttypes.h that doesn't define all of them.
- #
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether inttypes.h defines the PRI[doxu]64 macros" >&5
-$as_echo_n "checking whether inttypes.h defines the PRI[doxu]64 macros... " >&6; }
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
- #include <inttypes.h>
- #include <stdio.h>
- #include <sys/types.h>
-
- main()
- {
- printf("%" PRId64 "\n", (uint64_t)1);
- printf("%" PRIo64 "\n", (uint64_t)1);
- printf("%" PRIx64 "\n", (uint64_t)1);
- printf("%" PRIu64 "\n", (uint64_t)1);
- }
-
-
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
- ac_lbl_inttypes_h_defines_formats=yes
-
-else
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
- ac_lbl_inttypes_h_defines_formats=no
-
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-else
-
- #
- # We don't have inttypes.h, so it obviously can't define those
- # macros.
- #
- ac_lbl_inttypes_h_defines_formats=no
-
-fi
-
-done
-
-if test "$ac_lbl_inttypes_h_defines_formats" = no; then
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether %lx can be used to format 64-bit integers" >&5
-$as_echo_n "checking whether %lx can be used to format 64-bit integers... " >&6; }
- if test "$cross_compiling" = yes; then :
- { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-# ifdef HAVE_INTTYPES_H
- #include <inttypes.h>
-# endif
- #include <stdio.h>
- #include <sys/types.h>
-
- main()
- {
- uint64_t t = 1;
- char strbuf[16+1];
- sprintf(strbuf, "%016lx", t << 32);
- if (strcmp(strbuf, "0000000100000000") == 0)
- exit(0);
- else
- exit(1);
- }
-
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-
-$as_echo "#define PRId64 \"ld\"" >>confdefs.h
-
-
-$as_echo "#define PRIo64 \"lo\"" >>confdefs.h
-
-
-$as_echo "#define PRIx64 \"lx\"" >>confdefs.h
-
-
-$as_echo "#define PRIu64 \"lu\"" >>confdefs.h
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-else
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether %llx can be used to format 64-bit integers" >&5
-$as_echo_n "checking whether %llx can be used to format 64-bit integers... " >&6; }
- if test "$cross_compiling" = yes; then :
- { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-
-# ifdef HAVE_INTTYPES_H
- #include <inttypes.h>
-# endif
- #include <stdio.h>
- #include <sys/types.h>
-
- main()
- {
- uint64_t t = 1;
- char strbuf[16+1];
- sprintf(strbuf, "%016llx", t << 32);
- if (strcmp(strbuf, "0000000100000000") == 0)
- exit(0);
- else
- exit(1);
- }
-
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-
-$as_echo "#define PRId64 \"lld\"" >>confdefs.h
-
-
-$as_echo "#define PRIo64 \"llo\"" >>confdefs.h
-
-
-$as_echo "#define PRIx64 \"llx\"" >>confdefs.h
-
+# Testing the sizeof_t length modifier takes making an snprintf() call and
+# comparing the actual result with the expected result. If this fails, it will
+# most likely happen at run time, not compile time.
+#
+# Testing the 64-bit conversion specifiers in addition to that requires the
+# <inttypes.h> header to be present and the macros to be defined, so if this
+# fails, it will more likely happen at compile time.
+#
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether snprintf is suitable" >&5
+$as_echo_n "checking whether snprintf is suitable... " >&6; }
+if test "$cross_compiling" = yes; then :
-$as_echo "#define PRIu64 \"llu\"" >>confdefs.h
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: not while cross-compiling" >&5
+$as_echo "not while cross-compiling" >&6; }
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
else
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether %Lx can be used to format 64-bit integers" >&5
-$as_echo_n "checking whether %Lx can be used to format 64-bit integers... " >&6; }
- if test "$cross_compiling" = yes; then :
- { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-# ifdef HAVE_INTTYPES_H
- #include <inttypes.h>
-# endif
- #include <stdio.h>
- #include <sys/types.h>
-
- main()
- {
- uint64_t t = 1;
- char strbuf[16+1];
- sprintf(strbuf, "%016Lx", t << 32);
- if (strcmp(strbuf, "0000000100000000") == 0)
- exit(0);
- else
- exit(1);
- }
-
-
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-
-
-$as_echo "#define PRId64 \"Ld\"" >>confdefs.h
-
-
-$as_echo "#define PRIo64 \"Lo\"" >>confdefs.h
-
-
-$as_echo "#define PRIx64 \"Lx\"" >>confdefs.h
-
-
-$as_echo "#define PRIu64 \"Lu\"" >>confdefs.h
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/types.h>
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
+int main()
+{
+ char buf[100];
+ uint64_t t = (uint64_t)1 << 32;
-else
+ snprintf(buf, sizeof(buf), "%zu", sizeof(buf));
+ if (strncmp(buf, "100", sizeof(buf)))
+ return 1;
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
+ snprintf(buf, sizeof(buf), "%zd", -sizeof(buf));
+ if (strncmp(buf, "-100", sizeof(buf)))
+ return 2;
+ snprintf(buf, sizeof(buf), "%" PRId64, -t);
+ if (strncmp(buf, "-4294967296", sizeof(buf)))
+ return 3;
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether %qx can be used to format 64-bit integers" >&5
-$as_echo_n "checking whether %qx can be used to format 64-bit integers... " >&6; }
- if test "$cross_compiling" = yes; then :
- { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error $? "cannot run test program while cross compiling
-See \`config.log' for more details" "$LINENO" 5; }
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
+ snprintf(buf, sizeof(buf), "0o%" PRIo64, t);
+ if (strncmp(buf, "0o40000000000", sizeof(buf)))
+ return 4;
+ snprintf(buf, sizeof(buf), "0x%" PRIx64, t);
+ if (strncmp(buf, "0x100000000", sizeof(buf)))
+ return 5;
-# ifdef HAVE_INTTYPES_H
- #include <inttypes.h>
-# endif
- #include <stdio.h>
- #include <sys/types.h>
+ snprintf(buf, sizeof(buf), "%" PRIu64, t);
+ if (strncmp(buf, "4294967296", sizeof(buf)))
+ return 6;
- main()
- {
- uint64_t t = 1;
- char strbuf[16+1];
- sprintf(strbuf, "%016qx", t << 32);
- if (strcmp(strbuf, "0000000100000000") == 0)
- exit(0);
- else
- exit(1);
- }
+ return 0;
+}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
-
-$as_echo "#define PRId64 \"qd\"" >>confdefs.h
-
-
-$as_echo "#define PRIo64 \"qo\"" >>confdefs.h
-
-
-$as_echo "#define PRIx64 \"qx\"" >>confdefs.h
-
-
-$as_echo "#define PRIu64 \"qu\"" >>confdefs.h
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
else
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
-
- as_fn_error $? "neither %llx nor %Lx nor %qx worked on a 64-bit integer" "$LINENO" 5
-
-
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
- conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-
-
-
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
- conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-
-
+ as_fn_error $? "The snprintf(3) implementation in this libc is not suitable,
+tcpdump would not work correctly even if it managed to compile." "$LINENO" 5
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
fi
-
-
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
- conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-
-fi
-
#
# Check for some headers introduced in later versions of libpcap
# and used by some printers.
])
#
-# Check for <inttypes.h>
-#
-AC_CHECK_HEADERS(inttypes.h,
- [
- #
- # OK, we have inttypes.h, but does it define all the PRI[doxu]64 macros?
- # Some systems have an inttypes.h that doesn't define all of them.
- #
- AC_MSG_CHECKING([[whether inttypes.h defines the PRI[doxu]64 macros]])
- AC_COMPILE_IFELSE(
- [
- AC_LANG_SOURCE(
- [[
- #include <inttypes.h>
- #include <stdio.h>
- #include <sys/types.h>
-
- main()
- {
- printf("%" PRId64 "\n", (uint64_t)1);
- printf("%" PRIo64 "\n", (uint64_t)1);
- printf("%" PRIx64 "\n", (uint64_t)1);
- printf("%" PRIu64 "\n", (uint64_t)1);
- }
- ]])
- ],
- [
- AC_MSG_RESULT(yes)
- ac_lbl_inttypes_h_defines_formats=yes
- ],
- [
- AC_MSG_RESULT(no)
- ac_lbl_inttypes_h_defines_formats=no
- ])
- ],
- [
- #
- # We don't have inttypes.h, so it obviously can't define those
- # macros.
- #
- ac_lbl_inttypes_h_defines_formats=no
- ])
-if test "$ac_lbl_inttypes_h_defines_formats" = no; then
- AC_LBL_CHECK_64BIT_FORMAT(l,
+# It became apparent at some point that using a suitable C99 compiler does not
+# automatically mean snprintf(3) implementation in the libc supports all the
+# modifiers and specifiers used in the project, so let's test that before the
+# build, not after.
+#
+# Testing the sizeof_t length modifier takes making an snprintf() call and
+# comparing the actual result with the expected result. If this fails, it will
+# most likely happen at run time, not compile time.
+#
+# Testing the 64-bit conversion specifiers in addition to that requires the
+# <inttypes.h> header to be present and the macros to be defined, so if this
+# fails, it will more likely happen at compile time.
+#
+AC_MSG_CHECKING([whether snprintf is suitable])
+AC_RUN_IFELSE(
[
- AC_LBL_CHECK_64BIT_FORMAT(ll,
- [
- AC_LBL_CHECK_64BIT_FORMAT(L,
- [
- AC_LBL_CHECK_64BIT_FORMAT(q,
- [
- AC_MSG_ERROR([neither %llx nor %Lx nor %qx worked on a 64-bit integer])
- ])
- ])
- ])
- ])
-fi
+ AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <sys/types.h>
+
+int main()
+{
+ char buf[100];
+ uint64_t t = (uint64_t)1 << 32;
+
+ snprintf(buf, sizeof(buf), "%zu", sizeof(buf));
+ if (strncmp(buf, "100", sizeof(buf)))
+ return 1;
+
+ snprintf(buf, sizeof(buf), "%zd", -sizeof(buf));
+ if (strncmp(buf, "-100", sizeof(buf)))
+ return 2;
+
+ snprintf(buf, sizeof(buf), "%" PRId64, -t);
+ if (strncmp(buf, "-4294967296", sizeof(buf)))
+ return 3;
+
+ snprintf(buf, sizeof(buf), "0o%" PRIo64, t);
+ if (strncmp(buf, "0o40000000000", sizeof(buf)))
+ return 4;
+
+ snprintf(buf, sizeof(buf), "0x%" PRIx64, t);
+ if (strncmp(buf, "0x100000000", sizeof(buf)))
+ return 5;
+
+ snprintf(buf, sizeof(buf), "%" PRIu64, t);
+ if (strncmp(buf, "4294967296", sizeof(buf)))
+ return 6;
+
+ return 0;
+}
+ ]])
+ ],
+ [
+ AC_MSG_RESULT(yes)
+ ],
+ [
+ AC_MSG_RESULT(no)
+ AC_MSG_ERROR(
+[The snprintf(3) implementation in this libc is not suitable,
+tcpdump would not work correctly even if it managed to compile.])
+ ],
+ [
+ AC_MSG_RESULT(not while cross-compiling)
+ ]
+)
#
# Check for some headers introduced in later versions of libpcap
projects / platform / upstream / tcpdump.git / commitdiff