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improve detection of fdopen() and strerror_r()

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This commit is contained in:
Yang Tse
2008-09-12 01:16:26 +00:00
parent 28e2007767
commit b93ad10fa5
3 changed files with 334 additions and 112 deletions
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331
m4/curl-functions.m4
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@@ -22,7 +22,7 @@
#***************************************************************************
# File version for 'aclocal' use. Keep it a single number.
# serial 1
# serial 5
dnl CURL_INCLUDES_SIGNAL
@@ -46,6 +46,27 @@ curl_includes_signal="\
])
dnl CURL_INCLUDES_STDIO
dnl -------------------------------------------------
dnl Set up variable with list of headers that must be
dnl included when stdio.h is to be included.
AC_DEFUN([CURL_INCLUDES_STDIO], [
curl_includes_stdio="\
/* includes start */
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_STDIO_H
# include <stdio.h>
#endif
/* includes end */"
AC_CHECK_HEADERS(
sys/types.h stdio.h,
[], [], [$curl_includes_stdio])
])
dnl CURL_INCLUDES_STDLIB
dnl -------------------------------------------------
dnl Set up variable with list of headers that must be
@@ -138,6 +159,91 @@ curl_includes_unistd="\
])
dnl CURL_CHECK_FUNC_FDOPEN
dnl -------------------------------------------------
dnl Verify if fdopen is available, prototyped, and
dnl can be compiled. If all of these are true, and
dnl usage has not been previously disallowed with
dnl shell variable curl_disallow_fdopen, then
dnl HAVE_FDOPEN will be defined.
AC_DEFUN([CURL_CHECK_FUNC_FDOPEN], [
AC_REQUIRE([CURL_INCLUDES_STDIO])dnl
#
tst_links_fdopen="unknown"
tst_proto_fdopen="unknown"
tst_compi_fdopen="unknown"
tst_allow_fdopen="unknown"
#
AC_MSG_CHECKING([if fdopen can be linked])
AC_LINK_IFELSE([
AC_LANG_FUNC_LINK_TRY([fdopen])
],[
AC_MSG_RESULT([yes])
tst_links_fdopen="yes"
],[
AC_MSG_RESULT([no])
tst_links_fdopen="no"
])
#
if test "$tst_links_fdopen" = "yes"; then
AC_MSG_CHECKING([if fdopen is prototyped])
AC_EGREP_CPP([fdopen],[
$curl_includes_stdio
],[
AC_MSG_RESULT([yes])
tst_proto_fdopen="yes"
],[
AC_MSG_RESULT([no])
tst_proto_fdopen="no"
])
fi
#
if test "$tst_proto_fdopen" = "yes"; then
AC_MSG_CHECKING([if fdopen is compilable])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_stdio
]],[[
if(0 != fdopen(0, 0))
return 1;
]])
],[
AC_MSG_RESULT([yes])
tst_compi_fdopen="yes"
],[
AC_MSG_RESULT([no])
tst_compi_fdopen="no"
])
fi
#
if test "$tst_compi_fdopen" = "yes"; then
AC_MSG_CHECKING([if fdopen usage allowed])
if test "x$curl_disallow_fdopen" != "xyes"; then
AC_MSG_RESULT([yes])
tst_allow_fdopen="yes"
else
AC_MSG_RESULT([no])
tst_allow_fdopen="no"
fi
fi
#
AC_MSG_CHECKING([if fdopen might be used])
if test "$tst_links_fdopen" = "yes" &&
test "$tst_proto_fdopen" = "yes" &&
test "$tst_compi_fdopen" = "yes" &&
test "$tst_allow_fdopen" = "yes"; then
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_FDOPEN, 1,
[Define to 1 if you have the fdopen function.])
ac_cv_func_fdopen="yes"
else
AC_MSG_RESULT([no])
ac_cv_func_fdopen="no"
fi
])
dnl CURL_CHECK_FUNC_FTRUNCATE
dnl -------------------------------------------------
dnl Verify if ftruncate is available, prototyped, and
@@ -507,6 +613,229 @@ AC_DEFUN([CURL_CHECK_FUNC_STRDUP], [
])
dnl CURL_CHECK_FUNC_STRERROR_R
dnl -------------------------------------------------
dnl Verify if strerror_r is available, prototyped, can be compiled and
dnl seems to work. If all of these are true, and usage has not been
dnl previously disallowed with shell variable curl_disallow_strerror_r,
dnl then HAVE_GLIBC_STRERROR_R or HAVE_POSIX_STRERROR_R will be defined.
dnl
dnl glibc-style strerror_r:
dnl
dnl char *strerror_r(int errnum, char *workbuf, size_t bufsize);
dnl
dnl glibc-style strerror_r returns a pointer to the the error string,
dnl and might use the provided workbuf as a scratch area if needed. A
dnl quick test on a few systems shows that it's usually not used at all.
dnl
dnl POSIX-style strerror_r:
dnl
dnl int strerror_r(int errnum, char *resultbuf, size_t bufsize);
dnl
dnl POSIX-style strerror_r returns 0 upon successful completion and the
dnl error string in the provided resultbuf.
dnl
AC_DEFUN([CURL_CHECK_FUNC_STRERROR_R], [
AC_REQUIRE([CURL_INCLUDES_STRING])dnl
#
tst_links_strerror_r="unknown"
tst_proto_strerror_r="unknown"
tst_compi_strerror_r="unknown"
tst_glibc_strerror_r="unknown"
tst_posix_strerror_r="unknown"
tst_allow_strerror_r="unknown"
tst_works_glibc_strerror_r="unknown"
tst_works_posix_strerror_r="unknown"
#
AC_MSG_CHECKING([if strerror_r can be linked])
AC_LINK_IFELSE([
AC_LANG_FUNC_LINK_TRY([strerror_r])
],[
AC_MSG_RESULT([yes])
tst_links_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_links_strerror_r="no"
])
#
if test "$tst_links_strerror_r" = "yes"; then
AC_MSG_CHECKING([if strerror_r is prototyped])
AC_EGREP_CPP([strerror_r],[
$curl_includes_string
],[
AC_MSG_RESULT([yes])
tst_proto_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_proto_strerror_r="no"
])
fi
#
if test "$tst_proto_strerror_r" = "yes"; then
AC_MSG_CHECKING([if strerror_r is compilable])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_string
]],[[
if(0 != strerror_r(0, 0, 0))
return 1;
]])
],[
AC_MSG_RESULT([yes])
tst_compi_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_compi_strerror_r="no"
])
fi
#
if test "$tst_compi_strerror_r" = "yes"; then
AC_MSG_CHECKING([if strerror_r is glibc like])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_string
]],[[
char *strerror_r(int errnum, char *workbuf, size_t bufsize);
if(0 != strerror_r(0, 0, 0))
return 1;
]])
],[
AC_MSG_RESULT([yes])
tst_glibc_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_glibc_strerror_r="no"
])
fi
#
dnl only do runtime verification when not cross-compiling
if test "x$cross_compiling" != "xyes" &&
test "$tst_glibc_strerror_r" = "yes"; then
AC_MSG_CHECKING([if strerror_r seems to work])
AC_RUN_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_string
# include <errno.h>
]],[[
char buffer[1024];
char *string = 0;
buffer[0] = '\0';
string = strerror_r(EACCES, buffer, sizeof(buffer));
if(!string)
exit(1); /* fail */
if(!string[0])
exit(1); /* fail */
else
exit(0);
]])
],[
AC_MSG_RESULT([yes])
tst_works_glibc_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_works_glibc_strerror_r="no"
])
fi
#
if test "$tst_compi_strerror_r" = "yes" &&
test "$tst_works_glibc_strerror_r" != "yes"; then
AC_MSG_CHECKING([if strerror_r is POSIX like])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_string
]],[[
int strerror_r(int errnum, char *resultbuf, size_t bufsize);
if(0 != strerror_r(0, 0, 0))
return 1;
]])
],[
AC_MSG_RESULT([yes])
tst_posix_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_posix_strerror_r="no"
])
fi
#
dnl only do runtime verification when not cross-compiling
if test "x$cross_compiling" != "xyes" &&
test "$tst_posix_strerror_r" = "yes"; then
AC_MSG_CHECKING([if strerror_r seems to work])
AC_RUN_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_string
# include <errno.h>
]],[[
char buffer[1024];
int error = 1;
buffer[0] = '\0';
error = strerror_r(EACCES, buffer, sizeof(buffer));
if(error)
exit(1); /* fail */
if(buffer[0] == '\0')
exit(1); /* fail */
else
exit(0);
]])
],[
AC_MSG_RESULT([yes])
tst_works_posix_strerror_r="yes"
],[
AC_MSG_RESULT([no])
tst_works_posix_strerror_r="no"
])
fi
#
if test "$tst_glibc_strerror_r" = "yes" &&
test "$tst_works_glibc_strerror_r" != "no" &&
test "$tst_posix_strerror_r" != "yes"; then
tst_allow_strerror_r="check"
fi
if test "$tst_posix_strerror_r" = "yes" &&
test "$tst_works_posix_strerror_r" != "no" &&
test "$tst_glibc_strerror_r" != "yes"; then
tst_allow_strerror_r="check"
fi
if test "$tst_allow_strerror_r" = "check"; then
AC_MSG_CHECKING([if strerror_r usage allowed])
if test "x$curl_disallow_strerror_r" != "xyes"; then
AC_MSG_RESULT([yes])
tst_allow_strerror_r="yes"
else
AC_MSG_RESULT([no])
tst_allow_strerror_r="no"
fi
fi
#
AC_MSG_CHECKING([if strerror_r might be used])
if test "$tst_links_strerror_r" = "yes" &&
test "$tst_proto_strerror_r" = "yes" &&
test "$tst_compi_strerror_r" = "yes" &&
test "$tst_allow_strerror_r" = "yes"; then
AC_MSG_RESULT([yes])
if test "$tst_glibc_strerror_r" = "yes"; then
AC_DEFINE_UNQUOTED(HAVE_GLIBC_STRERROR_R, 1,
[Define to 1 if you have a working glibc-style strerror_r function.])
fi
if test "$tst_posix_strerror_r" = "yes"; then
AC_DEFINE_UNQUOTED(HAVE_POSIX_STRERROR_R, 1,
[Define to 1 if you have a working POSIX-style strerror_r function.])
fi
ac_cv_func_strerror_r="yes"
else
AC_MSG_RESULT([no])
ac_cv_func_strerror_r="no"
fi
#
if test "$tst_compi_strerror_r" = "yes" &&
test "$tst_allow_strerror_r" = "unknown"; then
AC_MSG_NOTICE([cannot determine strerror_r() style: edit lib/config.h manually.])
fi
#
])
dnl CURL_CHECK_FUNC_STRTOK_R
dnl -------------------------------------------------
dnl Verify if strtok_r is available, prototyped, and