如何在Solaris 11上安装.net Mono（源代码编译）？

Question

您设置的确切值_XOPEN_SOURCE并不重要。 Mono 错误地定义了_XOPEN_SOURCE_EXTENDED宏：

case "${host}" in
        *solaris* )
                AC_MSG_CHECKING(for Solaris XPG4 support)
                if test -f /usr/lib/libxnet.so; then
                        CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600"
                        CPPFLAGS="$CPPFLAGS -D__EXTENSIONS__"
                        CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED=1" <-- WRONG
                        LIBS="$LIBS -lxnet"

该_XOPEN_SOURCE_EXTENDED宏不存在于POSIX 6或者POSIX 7 标准。

即使 Linux 也同意_XOPEN_SOURCE_EXTENDED不应该在这里定义。每Linuxfeature_test_macros手册页:

_XOPEN_SOURCE_EXTENDED

如果定义了此宏，并且_XOPEN_SOURCE已定义，则公开与 XPG4v2 (SUSv1) UNIX 扩展 (UNIX 95) 相对应的定义。_XOPEN_SOURCE使用 500 或更大的值进行定义也会产生与定义相同的效果_XOPEN_SOURCE_EXTENDED。_XOPEN_SOURCE_EXTENDED应避免在新源代码中使用。

由于使用_XOPEN_SOURCE500 或更大的值进行定义与定义具有相同的效果_XOPEN_SOURCE_EXTENDED，因此后者（过时的）功能测试宏通常不会在手册页的概要中进行描述。

注意准确的措辞：

_XOPEN_SOURCE_EXTENDED如果定义了此宏 ( )，并且_XOPEN_SOURCE已定义，则公开与 XPG4v2 (SUSv1) UNIX 扩展 (UNIX 95) 对应的定义。 ...

定义_XOPEN_SOURCE 为任意值同时也在_XOPEN_SOURCE_EXTENDEDXPG4v2 中定义结果，那就是不是XPG6 是获取递归互斥体所必需的。

你可能会遇到Solaris 11 中的此检查/usr/include/sys/feature_tests.h:

/*
 * It is invalid to compile an XPG3, XPG4, XPG4v2, or XPG5 application
 * using c99.  The same is true for POSIX.1-1990, POSIX.2-1992, POSIX.1b,
 * and POSIX.1c applications. Likewise, it is invalid to compile an XPG6
 * or a POSIX.1-2001 application with anything other than a c99 or later
 * compiler.  Therefore, we force an error in both cases.
 */
#if defined(_STDC_C99) && (defined(__XOPEN_OR_POSIX) && !defined(_XPG6))
#error "Compiler or options invalid for pre-UNIX 03 X/Open applications \
 and pre-2001 POSIX applications"
#elif !defined(_STDC_C99) && \
 (defined(__XOPEN_OR_POSIX) && defined(_XPG6))
#error "Compiler or options invalid; UNIX 03 and POSIX.1-2001 applications \
 require the use of c99"
#endif

_XPG6被定义在文件的前面，在这个块中:

/*
 * Use of _XOPEN_SOURCE
 *
 * The following X/Open specifications are supported:
 *
 * X/Open Portability Guide, Issue 3 (XPG3)
 * X/Open CAE Specification, Issue 4 (XPG4)
 * X/Open CAE Specification, Issue 4, Version 2 (XPG4v2)
 * X/Open CAE Specification, Issue 5 (XPG5)
 * Open Group Technical Standard, Issue 6 (XPG6), also referred to as
 *    IEEE Std. 1003.1-2001 and ISO/IEC 9945:2002.
 *
 * XPG4v2 is also referred to as UNIX 95 (SUS or SUSv1).
 * XPG5 is also referred to as UNIX 98 or the Single Unix Specification,
 *     Version 2 (SUSv2)
 * XPG6 is the result of a merge of the X/Open and POSIX specifications
 *     and as such is also referred to as IEEE Std. 1003.1-2001 in
 *     addition to UNIX 03 and SUSv3.
 *
 * When writing a conforming X/Open application, as per the specification
 * requirements, the appropriate feature test macros must be defined at
 * compile time. These are as follows. For more info, see standards(5).
 *
 * Feature Test Macro                    Specification
 * ------------------------------------------------  -------------
 * _XOPEN_SOURCE                                         XPG3
 * _XOPEN_SOURCE && _XOPEN_VERSION = 4                   XPG4
 * _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED = 1           XPG4v2
 * _XOPEN_SOURCE = 500                                   XPG5
 * _XOPEN_SOURCE = 600  (or POSIX_C_SOURCE=200112L)      XPG6
 *
 * In order to simplify the guards within the headers, the following
 * implementation private test macros have been created. Applications
 * must NOT use these private test macros as unexpected results will
 * occur.
 *
 * Note that in general, the use of these private macros is cumulative.
 * For example, the use of _XPG3 with no other restrictions on the X/Open
 * namespace will make the symbols visible for XPG3 through XPG6
 * compilation environments. The use of _XPG4_2 with no other X/Open
 * namespace restrictions indicates that the symbols were introduced in
 * XPG4v2 and are therefore visible for XPG4v2 through XPG6 compilation
 * environments, but not for XPG3 or XPG4 compilation environments.
 *
 * _XPG3    X/Open Portability Guide, Issue 3 (XPG3)
 * _XPG4    X/Open CAE Specification, Issue 4 (XPG4)
 * _XPG4_2  X/Open CAE Specification, Issue 4, Version 2 (XPG4v2/UNIX 95/SUS)
 * _XPG5    X/Open CAE Specification, Issue 5 (XPG5/UNIX 98/SUSv2)
 * _XPG6    Open Group Technical Standard, Issue 6 (XPG6/UNIX 03/SUSv3)
 */

/* X/Open Portability Guide, Issue 3 */
#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE - 0 < 500) && \
    (_XOPEN_VERSION - 0 < 4) && !defined(_XOPEN_SOURCE_EXTENDED)
#define _XPG3
/* X/Open CAE Specification, Issue 4 */
#elif   (defined(_XOPEN_SOURCE) && _XOPEN_VERSION - 0 == 4)
#define _XPG4
#define _XPG3
/* X/Open CAE Specification, Issue 4, Version 2 */
#elif (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE_EXTENDED - 0 == 1)
#define _XPG4_2
#define _XPG4
#define _XPG3
/* X/Open CAE Specification, Issue 5 */
#elif   (_XOPEN_SOURCE - 0 == 500)
#define _XPG5
#define _XPG4_2
#define _XPG4
#define _XPG3
#undef  _POSIX_C_SOURCE
#define _POSIX_C_SOURCE         199506L
/* Open Group Technical Standard , Issue 6 */
#elif   (_XOPEN_SOURCE - 0 == 600) || (_POSIX_C_SOURCE - 0 == 200112L)
#define _XPG6
#define _XPG5
#define _XPG4_2
#define _XPG4
#define _XPG3
#undef  _POSIX_C_SOURCE
#define _POSIX_C_SOURCE         200112L
#undef  _XOPEN_SOURCE
#define _XOPEN_SOURCE           600
#endif

Answer 1