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Fix CMake macro special variable usage (#216)

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The argument-related variables in a macro body are not real variables,
but special substitutions. They cannot be directly referred to by name,
only expanded.
This commit is contained in:
randomguy3 2017-05-16 11:35:11 +01:00 • committed by Andreas Schuh
parent 95ffb27c9c
commit 21c7bcd895
1 changed files with 7 additions and 3 deletions
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10
cmake/utils.cmake
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@ -59,11 +59,13 @@ endmacro ()
# variable. When gflags is a subproject of another project (GFLAGS_IS_SUBPROJECT),
# the variable is not added to the CMake cache. Otherwise it is cached.
macro (gflags_define type varname docstring default)
if (ARGC GREATER 5)
# note that ARGC must be expanded here, as it is not a "real" variable
# (see the CMake documentation for the macro command)
if ("${ARGC}" GREATER 5)
message (FATAL_ERROR "gflags_variable: Too many macro arguments")
endif ()
if (NOT DEFINED GFLAGS_${varname})
if (GFLAGS_IS_SUBPROJECT AND ARGC EQUAL 5)
if (GFLAGS_IS_SUBPROJECT AND "${ARGC}" EQUAL 5)
set (GFLAGS_${varname} "${ARGV4}")
else ()
set (GFLAGS_${varname} "${default}")
@ -83,7 +85,9 @@ endmacro ()
macro (gflags_property varname property value)
gflags_is_cached (_cached ${varname})
if (_cached)
if (property STREQUAL ADVANCED)
# note that property must be expanded here, as it is not a "real" variable
# (see the CMake documentation for the macro command)
if ("${property}" STREQUAL "ADVANCED")
if (${value})
mark_as_advanced (FORCE ${varname})
else ()