diff options
Diffstat (limited to 'src/configure.in')
| -rw-r--r-- | src/configure.in | 157 |
1 files changed, 82 insertions, 75 deletions
diff --git a/src/configure.in b/src/configure.in index acbeb90dae4..41500ba1502 100644 --- a/src/configure.in +++ b/src/configure.in @@ -613,81 +613,6 @@ main() { double d = DBL_MIN; if (d != DBL_MIN) exit(-1); else exit(0); }], [AC_DEFINE(HAVE_DBL_MIN_PROBLEM) AC_MSG_RESULT(no)], AC_MSG_RESULT(assuming ok on target machine)) -dnl Check to see if we have a working 64-bit integer type. -AC_MSG_CHECKING(whether 'long int' is 64 bits) -AC_TRY_RUN([#include <stdio.h> -typedef long int int64; -#define INT64_FORMAT "%ld" - -int64 a = 20000001; -int64 b = 40000005; - -int does_int64_work() -{ - int64 c,d,e; - char buf[100]; - - if (sizeof(int64) != 8) - return 0; /* doesn't look like the right size */ - - /* we do perfunctory checks on multiply, divide, sprintf, sscanf */ - c = a * b; - sprintf(buf, INT64_FORMAT, c); - if (strcmp(buf, "800000140000005") != 0) - return 0; /* either multiply or sprintf is busted */ - if (sscanf(buf, INT64_FORMAT, &d) != 1) - return 0; - if (d != c) - return 0; - e = d / b; - if (e != a) - return 0; - return 1; -} -main() { - exit(! does_int64_work()); -}], - [AC_DEFINE(HAVE_LONG_INT_64) AC_MSG_RESULT(yes)], - AC_MSG_RESULT(no), - AC_MSG_RESULT(assuming not on target machine)) - -AC_MSG_CHECKING(whether 'long long int' is 64 bits) -AC_TRY_RUN([#include <stdio.h> -typedef long long int int64; -#define INT64_FORMAT "%lld" - -int64 a = 20000001; -int64 b = 40000005; - -int does_int64_work() -{ - int64 c,d,e; - char buf[100]; - - if (sizeof(int64) != 8) - return 0; /* doesn't look like the right size */ - - /* we do perfunctory checks on multiply, divide, sprintf, sscanf */ - c = a * b; - sprintf(buf, INT64_FORMAT, c); - if (strcmp(buf, "800000140000005") != 0) - return 0; /* either multiply or sprintf is busted */ - if (sscanf(buf, INT64_FORMAT, &d) != 1) - return 0; - if (d != c) - return 0; - e = d / b; - if (e != a) - return 0; - return 1; -} -main() { - exit(! does_int64_work()); -}], - [AC_DEFINE(HAVE_LONG_LONG_INT_64) AC_MSG_RESULT(yes)], - AC_MSG_RESULT(no), - AC_MSG_RESULT(assuming not on target machine)) - dnl Checks for library functions. AC_FUNC_MEMCMP AC_TYPE_SIGNAL @@ -766,6 +691,88 @@ fi ]) AC_SUBST(HPUXMATHLIB) +dnl Check to see if we have a working 64-bit integer type. +dnl This has to be done after checking for snprintf, because +dnl if the platform has snprintf then we need to know if snprintf +dnl works with 64-bit ints. However, if we are supplying our own +dnl snprintf then we expect that it will work as long as the basic +dnl 64-bit math operations work. NOTE that we will supply our own +dnl snprintf if either snprintf or vsnprintf is missing. + +AC_MSG_CHECKING(whether 'long int' is 64 bits) +AC_TRY_RUN([#include <stdio.h> +typedef long int int64; +#define INT64_FORMAT "%ld" + +int64 a = 20000001; +int64 b = 40000005; + +int does_int64_work() +{ + int64 c,d; + char buf[100]; + + if (sizeof(int64) != 8) + return 0; /* doesn't look like the right size */ + + /* we do perfunctory checks on multiply and divide, + * and also test snprintf if the platform provides snprintf. + */ + c = a * b; +#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) + snprintf(buf, 100, INT64_FORMAT, c); + if (strcmp(buf, "800000140000005") != 0) + return 0; /* either multiply or snprintf is busted */ +#endif + d = (c + b) / b; + if (d != a+1) + return 0; + return 1; +} +main() { + exit(! does_int64_work()); +}], + [AC_DEFINE(HAVE_LONG_INT_64) AC_MSG_RESULT(yes)], + AC_MSG_RESULT(no), + AC_MSG_RESULT(assuming not on target machine)) + +AC_MSG_CHECKING(whether 'long long int' is 64 bits) +AC_TRY_RUN([#include <stdio.h> +typedef long long int int64; +#define INT64_FORMAT "%lld" + +int64 a = 20000001; +int64 b = 40000005; + +int does_int64_work() +{ + int64 c,d; + char buf[100]; + + if (sizeof(int64) != 8) + return 0; /* doesn't look like the right size */ + + /* we do perfunctory checks on multiply and divide, + * and also test snprintf if the platform provides snprintf. + */ + c = a * b; +#if defined(HAVE_SNPRINTF) && defined(HAVE_VSNPRINTF) + snprintf(buf, 100, INT64_FORMAT, c); + if (strcmp(buf, "800000140000005") != 0) + return 0; /* either multiply or snprintf is busted */ +#endif + d = (c + b) / b; + if (d != a+1) + return 0; + return 1; +} +main() { + exit(! does_int64_work()); +}], + [AC_DEFINE(HAVE_LONG_LONG_INT_64) AC_MSG_RESULT(yes)], + AC_MSG_RESULT(no), + AC_MSG_RESULT(assuming not on target machine)) + dnl Check to see if platform has POSIX signal interface. dnl NOTE: if this test fails then POSIX signals definitely don't work. dnl It could be that the test compiles but the POSIX routines don't |