CheckStructHasMember¶
Check if the given struct or class has the specified member variable
- check_struct_has_member¶
check_struct_has_member(<struct> <member> <headers> <variable> [LANGUAGE <language>])
Check that the struct or class
<struct>has the specified<member>after including the given header(s)<headers>where the prototype should be declared. Specify the list of header files in one argument as a semicolon-separated list. The result is stored in an internal cache variable<variable>.The options are:
LANGUAGE <language>Use the
<language>compiler to perform the check. Acceptable values areCandCXX. If not specified, it defaults toC.
The following variables may be set before calling this macro to modify the way the check is run:
CMAKE_REQUIRED_FLAGSString of additional flags to pass to the compiler. The string must be space-delimited--a ;-list will not work. The contents of
CMAKE_<LANG>_FLAGSand its associated configuration-specific variable are automatically added to the compiler command before the contents ofCMAKE_REQUIRED_FLAGS.
CMAKE_REQUIRED_DEFINITIONSA ;-list of compiler definitions of the form
-DFOOor-DFOO=bar. A definition for the name specified by<resultVar>will also be added automatically.
CMAKE_REQUIRED_INCLUDESA ;-list of header search paths to pass to the compiler. These will be the only header search paths used--the contents of the
INCLUDE_DIRECTORIESdirectory property will be ignored.
CMAKE_REQUIRED_LINK_OPTIONSAdded in version 3.14.
A ;-list of options to add to the link command (see
try_compile()for further details).
CMAKE_REQUIRED_LIBRARIESA ;-list of libraries to add to the link command. These can be the name of system libraries or they can be Imported Targets (see
try_compile()for further details).
CMAKE_REQUIRED_LINK_DIRECTORIESAdded in version 3.31.
A ;-list of libraries search paths to pass to the linker (see
try_compile()for further details).
CMAKE_REQUIRED_QUIETAdded in version 3.1.
If this variable evaluates to a boolean true value, all status messages associated with the check will be suppressed.
Example¶
include(CheckStructHasMember)
check_struct_has_member("struct timeval" tv_sec sys/select.h
HAVE_TIMEVAL_TV_SEC LANGUAGE C)