GenEx: Add expressions to specify build- or install-only values

This is for specifying INCLUDE_DIRECTORIES relevant to the build-location
or the install location for example:

 set_property(TARGET foo PROPERTY
   INTERFACE_INCLUDE_DIRECTORIES
   "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR};${CMAKE_CURRENT_SOURCE_DIR}>"
   "$<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include>"
 )

A 'bar' target can then use:

 set_property(TARGET bar PROPERTY
   INCLUDE_DIRECTORIES
   "$<TARGET_PROPERTY:foo,INTERFACE_INCLUDE_DIRECTORIES>"
 )

and it will work whether foo is in the same project, or an imported target
from an installation location, or an imported target from a build location
generated by the export() command.

Because the generator expressions are only evaluated at build-time, these
new expressions are equivalent to the ZeroNode and OneNode.

The GeneratorExpression test is split into parts. Some shells can't run
the custom command as it is getting too long.
This commit is contained in:
Stephen Kelly 2012-09-23 13:16:44 +02:00
parent 95b74cafed
commit b2f1700bc7
8 changed files with 144 additions and 38 deletions

View File

@ -26,6 +26,12 @@
"strings which contain a '>' for example.\n" \
" $<COMMA> = A literal ','. Used to compare " \
"strings which contain a ',' for example.\n" \
" $<INSTALL_INTERFACE:...> = content of \"...\" when the property " \
"is exported using install(EXPORT), and empty otherwise.\n" \
" $<BUILD_INTERFACE:...> = content of \"...\" when the property " \
"is exported using export(), or when the target is used by another " \
"target in the same buildsystem. Expands to the empty string " \
"otherwise.\n" \
" $<TARGET_FILE:tgt> = main file (.exe, .so.1.2, .a)\n" \
" $<TARGET_LINKER_FILE:tgt> = file used to link (.a, .lib, .so)\n" \
" $<TARGET_SONAME_FILE:tgt> = file with soname (.so.3)\n" \

View File

@ -123,15 +123,9 @@ cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression()
}
}
std::string cmGeneratorExpression::Preprocess(const std::string &input,
PreprocessContext context)
//----------------------------------------------------------------------------
static std::string stripAllGeneratorExpressions(const std::string &input)
{
if (context != StripAllGeneratorExpressions)
{
assert(!"cmGeneratorExpression::Preprocess called with invalid args");
return std::string();
}
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
@ -170,3 +164,81 @@ std::string cmGeneratorExpression::Preprocess(const std::string &input,
result += input.substr(lastPos);
return result;
}
//----------------------------------------------------------------------------
static std::string stripExportInterface(const std::string &input,
cmGeneratorExpression::PreprocessContext context)
{
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while((pos = input.find("$<BUILD_INTERFACE:", lastPos)) != input.npos
|| (pos = input.find("$<INSTALL_INTERFACE:", lastPos)) != input.npos)
{
result += input.substr(lastPos, pos - lastPos);
const bool gotInstallInterface = input[pos + 2] == 'I';
pos += gotInstallInterface ? sizeof("$<INSTALL_INTERFACE:") - 1
: sizeof("$<BUILD_INTERFACE:") - 1;
int nestingLevel = 1;
const char *c = input.c_str() + pos;
const char * const cStart = c;
for ( ; *c; ++c)
{
if(c[0] == '$' && c[1] == '<')
{
++nestingLevel;
++c;
continue;
}
if(c[0] == '>')
{
--nestingLevel;
if (nestingLevel != 0)
{
continue;
}
if(context == cmGeneratorExpression::BuildInterface
&& !gotInstallInterface)
{
result += input.substr(pos, c - cStart);
}
else if(context == cmGeneratorExpression::InstallInterface
&& gotInstallInterface)
{
result += input.substr(pos, c - cStart);
}
break;
}
}
const std::string::size_type traversed = (c - cStart) + 1;
if (!*c)
{
result += std::string(gotInstallInterface ? "$<INSTALL_INTERFACE:"
: "$<BUILD_INTERFACE:")
+ input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
result += input.substr(lastPos);
return result;
}
//----------------------------------------------------------------------------
std::string cmGeneratorExpression::Preprocess(const std::string &input,
PreprocessContext context)
{
if (context == StripAllGeneratorExpressions)
{
return stripAllGeneratorExpressions(input);
}
else if (context == BuildInterface || context == InstallInterface)
{
return stripExportInterface(input, context);
}
assert(!"cmGeneratorExpression::Preprocess called with invalid args");
return std::string();
}

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@ -51,7 +51,9 @@ public:
cmsys::auto_ptr<cmCompiledGeneratorExpression> Parse(const char* input);
enum PreprocessContext {
StripAllGeneratorExpressions
StripAllGeneratorExpressions,
BuildInterface,
InstallInterface
};
static std::string Preprocess(const std::string &input,

View File

@ -95,6 +95,12 @@ static const struct OneNode : public cmGeneratorExpressionNode
}
} oneNode;
//----------------------------------------------------------------------------
static const struct OneNode buildInterfaceNode;
//----------------------------------------------------------------------------
static const struct ZeroNode installInterfaceNode;
//----------------------------------------------------------------------------
#define BOOLEAN_OP_NODE(OPNAME, OP, SUCCESS_VALUE, FAILURE_VALUE) \
static const struct OP ## Node : public cmGeneratorExpressionNode \
@ -593,6 +599,10 @@ cmGeneratorExpressionNode* GetNode(const std::string &identifier)
return &commaNode;
else if (identifier == "TARGET_PROPERTY")
return &targetPropertyNode;
else if (identifier == "BUILD_INTERFACE")
return &buildInterfaceNode;
else if (identifier == "INSTALL_INTERFACE")
return &installInterfaceNode;
return 0;
}

View File

@ -1,7 +1,7 @@
cmake_minimum_required (VERSION 2.8.8)
project(GeneratorExpression NONE)
add_custom_target(check ALL
add_custom_target(check-part1 ALL
COMMAND ${CMAKE_COMMAND}
-Dtest_0=$<0:nothing>
-Dtest_0_with_comma=$<0:-Wl,--no-undefined>
@ -57,6 +57,13 @@ add_custom_target(check ALL
-Dtest_colons_3=$<1:Qt5::Core>
-Dtest_colons_4=$<1:C:\\CMake>
-Dtest_colons_5=$<1:C:/CMake>
-P ${CMAKE_CURRENT_SOURCE_DIR}/check-part1.cmake
COMMAND ${CMAKE_COMMAND} -E echo "check done (part 1 of 2)"
VERBATIM
)
add_custom_target(check-part2 ALL
COMMAND ${CMAKE_COMMAND}
-Dtest_incomplete_1=$<
-Dtest_incomplete_2=$<something
-Dtest_incomplete_3=$<something:
@ -78,7 +85,9 @@ add_custom_target(check ALL
-Dtest_incomplete_19=$<1:some,thing$<ANGLE-R>
-Dtest_incomplete_20=$<CONFIGURATION$<ANGLE-R>
-Dtest_incomplete_21=$<BOOL:something$<ANGLE-R>
-P ${CMAKE_CURRENT_SOURCE_DIR}/check.cmake
COMMAND ${CMAKE_COMMAND} -E echo "check done"
-Dtest_build_interface=$<BUILD_INTERFACE:build>
-Dtest_install_interface=$<INSTALL_INTERFACE:install>
-P ${CMAKE_CURRENT_SOURCE_DIR}/check-part2.cmake
COMMAND ${CMAKE_COMMAND} -E echo "check done (part 2 of 2)"
VERBATIM
)

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@ -0,0 +1,5 @@
macro(check var val)
if(NOT "${${var}}" STREQUAL "${val}")
message(SEND_ERROR "${var} is \"${${var}}\", not \"${val}\"")
endif()
endmacro()

View File

@ -1,8 +1,5 @@
macro(check var val)
if(NOT "${${var}}" STREQUAL "${val}")
message(SEND_ERROR "${var} is \"${${var}}\", not \"${val}\"")
endif()
endmacro()
include(${CMAKE_CURRENT_LIST_DIR}/check-common.cmake)
message(STATUS "config=[${config}]")
check(test_0 "")
@ -57,24 +54,3 @@ check(test_colons_2 "::")
check(test_colons_3 "Qt5::Core")
check(test_colons_4 "C:\\\\CMake")
check(test_colons_5 "C:/CMake")
check(test_incomplete_1 "$<")
check(test_incomplete_2 "$<something")
check(test_incomplete_3 "$<something:")
check(test_incomplete_4 "$<something:,")
check(test_incomplete_5 "$something:,>")
check(test_incomplete_6 "<something:,>")
check(test_incomplete_7 "$<something::")
check(test_incomplete_8 "$<something:,")
check(test_incomplete_9 "$<something:,,")
check(test_incomplete_10 "$<something:,:")
check(test_incomplete_11 "$<something,,")
check(test_incomplete_12 "$<,,")
check(test_incomplete_13 "$<somespecialthing")
check(test_incomplete_14 "$<>")
check(test_incomplete_15 "$<some$<thing")
check(test_incomplete_16 "$<BOOL:something")
check(test_incomplete_17 "some$thing")
check(test_incomplete_18 "$<1:some,thing")
check(test_incomplete_19 "$<1:some,thing>")
check(test_incomplete_20 "$<CONFIGURATION>")
check(test_incomplete_21 "$<BOOL:something>")

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@ -0,0 +1,26 @@
include(${CMAKE_CURRENT_LIST_DIR}/check-common.cmake)
check(test_incomplete_1 "$<")
check(test_incomplete_2 "$<something")
check(test_incomplete_3 "$<something:")
check(test_incomplete_4 "$<something:,")
check(test_incomplete_5 "$something:,>")
check(test_incomplete_6 "<something:,>")
check(test_incomplete_7 "$<something::")
check(test_incomplete_8 "$<something:,")
check(test_incomplete_9 "$<something:,,")
check(test_incomplete_10 "$<something:,:")
check(test_incomplete_11 "$<something,,")
check(test_incomplete_12 "$<,,")
check(test_incomplete_13 "$<somespecialthing")
check(test_incomplete_14 "$<>")
check(test_incomplete_15 "$<some$<thing")
check(test_incomplete_16 "$<BOOL:something")
check(test_incomplete_17 "some$thing")
check(test_incomplete_18 "$<1:some,thing")
check(test_incomplete_19 "$<1:some,thing>")
check(test_incomplete_20 "$<CONFIGURATION>")
check(test_incomplete_21 "$<BOOL:something>")
check(test_build_interface "build")
check(test_install_interface "")