No, it should be empty because he wants to test whether HELLO is in
LIBS. But inside the IF statement, the ${VALUE} that evaluates to LIB
(a member of LIBS) gets then expanded again to HELLO.
Quite funny actually. However, reading the manpage closely only the
left-hand value of STREQUAL gets expanded, so reversing the statement
solves the problem.
Michael
On 19. Nov, 2009, at 9:40 , Marcel Loose wrote:
Hi Aaron,
If I run your script (using CMake 2.6.2) I get
-- CONTAINS_LIB = TRUE
as output. Isn't that what you expected? If not, then I'm missing the
point of your macro LIST_CONTAINS. What version of CMake are you
using?
Best regards,
Marcel Loose.
On Wed, 2009-11-18 at 09:54 -0800, aaron_wri...@selinc.com wrote:
I have a little question about how to prevent double substitution in
an IF statement.
Consider this macro that looks through a list for a string, and
sets a
variable to TRUE if it is found. The problem I have is that the IF
statement substitutes ${VALUE2} with LIB, and then substitutes LIB
with HELLO, and finds what it's looking for, even though it wasn't
really there. I want it to stop at the first substitution to prevent
this weird behavior. Ideas?
MACRO(LIST_CONTAINS VAR VALUE)
SET(${VAR})
FOREACH(VALUE2 ${ARGN})
IF(${VALUE} STREQUAL ${VALUE2})
SET(${VAR} TRUE)
ENDIF()
ENDFOREACH()
ENDMACRO()
SET(LIB HELLO)
SET(LIBS LIB IS GREAT)
LIST_CONTAINS(CONTAINS_LIB ${LIB} ${LIBS})
MESSAGE(STATUS "CONTAINS_LIB = ${CONTAINS_LIB}")
---------------------------------------------------------
Aaron Wright
Software Engineer - DCS Group
Schweitzer Engineering Laboratories, Inc.
Pullman, WA 99163
509-334-8087
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