diff options
| -rw-r--r-- | configure.ac | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index 41ba5a49..fbb7b3c2 100644 --- a/configure.ac +++ b/configure.ac @@ -245,9 +245,23 @@ AM_CONDITIONAL([STATIC_BSDCPIO], [ test "$static_bsdcpio" = yes ]) # Set up defines needed before including any headers case $host in *mingw* | *cygwin* | *msys* ) - AC_DEFINE([_WIN32_WINNT], 0x0502, [Define to '0x0502' for Windows Server 2003 APIs.]) - AC_DEFINE([WINVER], 0x0502, [Define to '0x0502' for Windows Server 2003 APIs.]) - AC_DEFINE([NTDDI_VERSION], 0x05020000, [Define to '0x05020000' for Windows Server 2003 APIs.]) + AC_PREPROC_IFELSE([AC_LANG_PROGRAM( + [[#ifdef _WIN32_WINNT + # error _WIN32_WINNT already defined + #endif + ]],[[;]]) + ],[ + AC_DEFINE([_WIN32_WINNT], 0x0502, [Define to '0x0502' for Windows Server 2003 APIs.]) + AC_DEFINE([NTDDI_VERSION], 0x05020000, [Define to '0x05020000' for Windows Server 2003 APIs.]) + ]) + AC_PREPROC_IFELSE([AC_LANG_PROGRAM( + [[#ifdef WINVER + # error WINVER already defined + #endif + ]],[[;]]) + ],[ + AC_DEFINE([WINVER], 0x0502, [Define to '0x0502' for Windows Server 2003 APIs.]) + ]) ;; esac |