Add check to make sure POSIX functions are available in Cygwin.

boostorg · Aug 25, 2024 · 5b9a58d · 5b9a58d
1 parent 68c7e80
commit 5b9a58d
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Showing 2 changed files with 5 additions and 1 deletion.
diff --git a/include/boost/interprocess/detail/workaround.hpp b/include/boost/interprocess/detail/workaround.hpp
@@ -34,6 +34,10 @@
 #else
    #include <unistd.h>
 
+   #if defined (__CYGWIN__) && (!defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE < 200112L))
+   #error "Error: Compiling on Cygwin without POSIX is not supported. Please define _XOPEN_SOURCE >= 600 or _POSIX_C_SOURCE >= 200112 when compiling"
+   #endif
+
    //////////////////////////////////////////////////////
    //Check for XSI shared memory objects. They are available in nearly all UNIX platforms
    //////////////////////////////////////////////////////

diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
@@ -25,7 +25,7 @@ project : requirements
     <target-os>hpux,<toolset>gcc:<linkflags>"-Wl,+as,mpas"
     <target-os>windows,<toolset>clang:<linkflags>"-lole32 -loleaut32 -lpsapi -ladvapi32"
     <target-os>linux:<linkflags>"-lrt"
-    #cygwin with -std=c++XX does not include POSIX
+    #cygwin with -std=c++XX does not include POSIX features, so always request them
     <target-os>cygwin:<define>_XOPEN_SOURCE=600
     ;