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Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/acinclude.m4 b/acinclude.m4 new file mode 100644 index 0000000..185907f --- /dev/null +++ b/acinclude.m4 @@ -0,0 +1,127 @@ +dnl Special Autoconf Macros for OpenVPN + +dnl OPENVPN_ADD_LIBS(LIB) +AC_DEFUN([OPENVPN_ADD_LIBS], [ + LIBS="$1 $LIBS" +]) + +dnl @synopsis AX_EMPTY_ARRAY +dnl +dnl Define EMPTY_ARRAY_SIZE to be either "0" +dnl or "" depending on which syntax the compiler +dnl prefers for empty arrays in structs. +dnl +dnl @version +dnl @author James Yonan <jim@yonan.net> + + +AC_DEFUN([AX_EMPTY_ARRAY], [ + AC_MSG_RESULT([checking for C compiler empty array support]) + AC_COMPILE_IFELSE( + [ + struct { int foo; int bar[[0]]; } mystruct; + ], [ + AC_DEFINE_UNQUOTED(EMPTY_ARRAY_SIZE, 0, [Dimension to use for empty array declaration]) + ], [ + AC_COMPILE_IFELSE( + [ + struct { int foo; int bar[[]]; } mystruct; + ], [ + AC_DEFINE_UNQUOTED(EMPTY_ARRAY_SIZE,, [Dimension to use for empty array declaration]) + ], [ + AC_MSG_ERROR([C compiler is unable to creaty empty arrays]) + ]) + ]) + ] +) + +dnl @synopsis AX_CPP_VARARG_MACRO_GCC +dnl +dnl Test if the preprocessor understands GNU GCC-style vararg macros. +dnl If it does, defines HAVE_CPP_VARARG_MACRO_GCC to 1. +dnl +dnl @version +dnl @author James Yonan <jim@yonan.net>, Matthias Andree <matthias.andree@web.de> +AC_DEFUN([AX_CPP_VARARG_MACRO_GCC], [dnl + AS_VAR_PUSHDEF([VAR],[ax_cv_cpp_vararg_macro_gcc])dnl + AC_CACHE_CHECK([for GNU GCC vararg macro support], VAR, [dnl + AC_COMPILE_IFELSE([ + #define macro(a, b...) func(a, b) + int func(int a, int b, int c); + int test() { return macro(1, 2, 3); } + ], [ VAR=yes ], [VAR=no])]) + if test $VAR = yes ; then + AC_DEFINE([HAVE_CPP_VARARG_MACRO_GCC], 1, + [Define to 1 if your compiler supports GNU GCC-style variadic macros]) + fi + AS_VAR_POPDEF([VAR])dnl +]) + +dnl @synopsis AX_CPP_VARARG_MACRO_ISO +dnl +dnl Test if the preprocessor understands ISO C 1999 vararg macros. +dnl If it does, defines HAVE_CPP_VARARG_MACRO_ISO to 1. +dnl +dnl @version +dnl @author James Yonan <jim@yonan.net>, Matthias Andree <matthias.andree@web.de> +AC_DEFUN([AX_CPP_VARARG_MACRO_ISO], [dnl + AS_VAR_PUSHDEF([VAR],[ax_cv_cpp_vararg_macro_iso])dnl + AC_CACHE_CHECK([for ISO C 1999 vararg macro support], VAR, [dnl + AC_COMPILE_IFELSE([ +#define macro(a, ...) func(a, __VA_ARGS__) + int func(int a, int b, int c); + int test() { return macro(1, 2, 3); } + ], [ VAR=yes ], [VAR=no])]) + if test $VAR = yes ; then + AC_DEFINE([HAVE_CPP_VARARG_MACRO_ISO], 1, + [Define to 1 if your compiler supports ISO C99 variadic macros]) + fi + AS_VAR_POPDEF([VAR])dnl +]) + +dnl -- The following is taken from curl's acinclude.m4 -- +dnl Check for socklen_t: historically on BSD it is an int, and in +dnl POSIX 1g it is a type of its own, but some platforms use different +dnl types for the argument to getsockopt, getpeername, etc. So we +dnl have to test to find something that will work. +AC_DEFUN([TYPE_SOCKLEN_T], +[ + AC_CHECK_TYPE([socklen_t], ,[ + AC_MSG_CHECKING([for socklen_t equivalent]) + AC_CACHE_VAL([curl_cv_socklen_t_equiv], + [ + case "$host" in + *-mingw*) curl_cv_socklen_t_equiv=int ;; + *) + # Systems have either "struct sockaddr *" or + # "void *" as the second argument to getpeername + curl_cv_socklen_t_equiv= + for arg2 in "struct sockaddr" void; do + for t in int size_t unsigned long "unsigned long"; do + AC_TRY_COMPILE([ + #include <sys/types.h> + #include <sys/socket.h> + + int getpeername (int, $arg2 *, $t *); + ],[ + $t len; + getpeername(0,0,&len); + ],[ + curl_cv_socklen_t_equiv="$t" + break + ]) + done + done + ;; + esac + + if test "x$curl_cv_socklen_t_equiv" = x; then + AC_MSG_ERROR([Cannot find a type to use in place of socklen_t]) + fi + ]) + AC_MSG_RESULT($curl_cv_socklen_t_equiv) + AC_DEFINE_UNQUOTED(socklen_t, $curl_cv_socklen_t_equiv, + [type to use in place of socklen_t if not defined])], + [#include <sys/types.h> +#include <sys/socket.h>]) +]) |