diff options
| author | Damien Miller <djm@mindrot.org> | 2014-01-22 21:30:12 +1100 |
|---|---|---|
| committer | Damien Miller <djm@mindrot.org> | 2014-01-22 21:30:12 +1100 |
| commit | 5c2ff5e31f57d303ebb414d84a934c02728fa568 (patch) | |
| tree | b1c8a8a1d6eee29847c3de5d7ebe00f79f44db93 /aclocal.m4 | |
| parent | 852472a54b8a0dc3e53786b313baaa86850a4273 (diff) | |
- (djm) [configure.ac aclocal.m4] More tests to detect fallout from
platform hardening options: include some long long int arithmatic
to detect missing support functions for -ftrapv in libgcc and
equivalents, actually test linking when -ftrapv is supplied and
set either both -pie/-fPIE or neither. feedback and ok dtucker@
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 45 |
1 files changed, 42 insertions, 3 deletions
@@ -1,4 +1,4 @@ -dnl $Id: aclocal.m4,v 1.12 2014/01/21 02:10:27 djm Exp $ +dnl $Id: aclocal.m4,v 1.13 2014/01/22 10:30:12 djm Exp $ dnl dnl OpenSSH-specific autoconf macros dnl @@ -21,7 +21,45 @@ int main(int argc, char **argv) { int i = 123 * argc, j = 456 + argc, k = 789 - argc; float l = i * 2.1; double m = l / 0.5; - printf("%d %d %d %f %f\n", i, j, k, l, m); + long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; + printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); + exit(0); +} + ]])], + [ +if `grep -i "unrecognized option" conftest.err >/dev/null` +then + AC_MSG_RESULT([no]) + CFLAGS="$saved_CFLAGS" +else + AC_MSG_RESULT([yes]) + CFLAGS="$saved_CFLAGS $_define_flag" +fi], + [ AC_MSG_RESULT([no]) + CFLAGS="$saved_CFLAGS" ] + ) +}]) + +dnl OSSH_CHECK_CFLAG_LINK(check_flag[, define_flag]) +dnl Check that $CC accepts a flag 'check_flag'. If it is supported append +dnl 'define_flag' to $CFLAGS. If 'define_flag' is not specified, then append +dnl 'check_flag'. +AC_DEFUN([OSSH_CHECK_CFLAG_LINK], [{ + AC_MSG_CHECKING([if $CC supports compile flag $1 and linking succeeds]) + saved_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS $WERROR $1" + _define_flag="$2" + test "x$_define_flag" = "x" && _define_flag="$1" + AC_LINK_IFELSE([AC_LANG_SOURCE([[ +#include <stdlib.h> +#include <stdio.h> +int main(int argc, char **argv) { + /* Some math to catch -ftrapv problems in the toolchain */ + int i = 123 * argc, j = 456 + argc, k = 789 - argc; + float l = i * 2.1; + double m = l / 0.5; + long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; + printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); exit(0); } ]])], @@ -57,7 +95,8 @@ int main(int argc, char **argv) { int i = 123 * argc, j = 456 + argc, k = 789 - argc; float l = i * 2.1; double m = l / 0.5; - printf("%d %d %d %f %f\n", i, j, k, l, m); + long long int n = argc * 12345LL, o = 12345LL * (long long int)argc; + printf("%d %d %d %f %f %lld %lld\n", i, j, k, l, m, n, o); exit(0); } ]])], |