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Add target property LINK_SEARCH_START_STATIC to aid static linking 

Commit afd7d4ca (Add target property LINK_SEARCH_END_STATIC, 2008-01-31)
defined a property to ensure that static runtime libraries get selected.
Add a property to specify that all libraries whose type is unknown, such
as "-lm", should be assumed static.  Furthermore it assumes that an
option such as "-static" is also used so that no initial -Bstatic is
needed.
This commit is contained in:
Brad King 2011-03-03 17:08:31 -05:00
parent cbb5ae60be
commit 5abfb57184
2 changed files with 26 additions and 11 deletions
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6
Source/cmComputeLinkInformation.cxx
View File

@ -817,9 +817,9 @@ void cmComputeLinkInformation::ComputeLinkTypeInfo()
this->SharedLinkTypeFlag = shared_link_type_flag;
}
// TODO: Lookup the starting link type from the target (is it being
// linked statically?).
this->StartLinkType = LinkShared;
// Lookup the starting link type from the target (linked statically?).
const char* lss = this->Target->GetProperty("LINK_SEARCH_START_STATIC");
this->StartLinkType = cmSystemTools::IsOn(lss)? LinkStatic : LinkShared;
this->CurrentLinkType = this->StartLinkType;
}

31
Source/cmTarget.cxx
View File

@ -487,17 +487,32 @@ void cmTarget::DefineProperties(cmake *cm)
"Per-configuration linker flags for a target.",
"This is the configuration-specific version of LINK_FLAGS.");
#define CM_LINK_SEARCH_SUMMARY \
"Some linkers support switches such as -Bstatic and -Bdynamic " \
"to determine whether to use static or shared libraries for -lXXX " \
"options. CMake uses these options to set the link type for " \
"libraries whose full paths are not known or (in some cases) are in " \
"implicit link directories for the platform. "
cm->DefineProperty
("LINK_SEARCH_START_STATIC", cmProperty::TARGET,
"Assume the linker looks for static libraries by default.",
CM_LINK_SEARCH_SUMMARY
"By default the linker search type is assumed to be -Bdynamic at "
"the beginning of the library list. This property switches the "
"assumption to -Bstatic. It is intended for use when linking an "
"executable statically (e.g. with the GNU -static option). "
"See also LINK_SEARCH_END_STATIC.");
cm->DefineProperty
("LINK_SEARCH_END_STATIC", cmProperty::TARGET,
"End a link line such that static system libraries are used.",
"Some linkers support switches such as -Bstatic and -Bdynamic "
"to determine whether to use static or shared libraries for -lXXX "
"options. CMake uses these options to set the link type for "
"libraries whose full paths are not known or (in some cases) are in "
"implicit link directories for the platform. By default the "
"linker search type is left at -Bdynamic by the end of the library "
"list. This property switches the final linker search type to "
"-Bstatic.");
CM_LINK_SEARCH_SUMMARY
"By default CMake adds an option at the end of the library list (if "
"necessary) to set the linker search type back to its starting type. "
"This property switches the final linker search type to -Bstatic "
"regardless of how it started. "
"See also LINK_SEARCH_START_STATIC.");
cm->DefineProperty
("LINKER_LANGUAGE", cmProperty::TARGET,