Headeronlylibs part2

src/actions/make/make_cpp.lua

@@ -463,6 +463,10 @@
  lddeps = libdeps
  end
 
+ if #libdeps == 0 and not table.icontains(table.translate(cfg.files, path.issourcefile), true) then
+ return
+ end
+
  _p(' ALL_LDFLAGS += $(LDFLAGS)%s', make.list(table.join(cc.getlibdirflags(cfg), cc.getldflags(cfg), cfg.linkoptions)))
  _p(' LIBDEPS +=%s', libdeps)
  _p(' LDDEPS +=%s', lddeps)

src/actions/make/make_swift.lua

@@ -120,7 +120,11 @@ function swift.file_rules(prj, objfiles)
 end
 
 function swift.linker(prj, tool)
- local lddeps = make.list(premake.getlinks(prj, "siblings", "fullpath")) 
+ local lddeps = make.list(premake.getlinks(prj, "siblings", "fullpath"))
+
+ if #lddeps == 0 and not table.icontains(table.translate(prj.files, path.isswiftfile), true) then
+ return
+ end
 
  if prj.kind == "StaticLib" then
  _p("$(TARGET): $(OBJECTS) %s ", lddeps)

src/actions/ninja/ninja_cpp.lua

@@ -356,6 +356,10 @@ end
  libs = ninja.list(libs) .. " " .. ninja.list(tool.getlinkflags(cfg))
  walibs = ninja.list(walibs)
 
+ if #objfiles + #lddeps == 0 then
+ return
+ end
+
  local function writevars()
  _p(1, "all_ldflags = " .. all_ldflags)
  _p(1, "libs = " .. libs)

src/actions/ninja/ninja_solution.lua

@@ -140,17 +140,22 @@ end
  cfgs[key] = cfg:getoutputfilename() .. " "
 
  if not cfgs["all"] then cfgs["all"] = "" end
- cfgs["all"] = cfgs["all"] .. cfg:getoutputfilename() .. " "
 
- -- set first configuration name
+ -- set first configuration name and 'all' configs to build
  if (cfg_start == nil) and (cfg.solution.startproject == key) then
  cfg_start = key
  end
  if (cfg_first == nil) and (cfg.kind == "ConsoleApp" or cfg.kind == "WindowedApp") then
  cfg_first = key
+ cfgs["all"] = cfgs["all"] .. cfg:getoutputfilename() .. " "
  end
  if (cfg_first_lib == nil) and (cfg.kind == "StaticLib" or cfg.kind == "SharedLib") then
  cfg_first_lib = key
+
+ -- only set if there's actually something to build
+ if table.icontains(table.translate(cfg.files, path.issourcefile), true) then
+ cfgs["all"] = cfgs["all"] .. cfg:getoutputfilename() .. " "
+ end
  end
 
  -- include other ninja file

src/actions/ninja/ninja_swift.lua

@@ -110,6 +110,10 @@ local p = premake
 
  function swift.linker(prj, cfg, objfiles, tool)
  local lddeps = ninja.list(premake.getlinks(cfg, "siblings", "fullpath")) 
+
+ if #objfiles + #lddeps == 0 then
+ return
+ end
 
  if cfg.kind == "StaticLib" then
  _p("build $target: ar %s | %s ", ninja.list(objfiles), lddeps)

src/actions/ninja/ninja_swift_incremental.lua

@@ -159,9 +159,13 @@ function swift.linker(prj, cfg, depfiles, tool)
 
  _p("build $out_dir/$module_name.swiftmodule | $out_dir/$module_name.swiftdoc: swiftm %s | %s", table.concat(modfiles, " "), table.concat(docfiles, " "))
  _p("")
- 
+
  local output = cfg:getoutputfilename()
 
+ if #objfiles + #modfiles + #docfiles == 0 then
+ return
+ end
+
  if cfg.kind == "StaticLib" then
  local ar_flags = ninja.list(tool.getarchiveflags(cfg, cfg, false))
  _p("build %s: ar %s | %s $out_dir/$module_name.swiftmodule $out_dir/$module_name.swiftdoc", output, table.concat(objfiles, " "), lddeps)

src/base/project.lua

@@ -340,7 +340,7 @@
  if prj and kind ~= "system" then
 
  local prjcfg = premake.getconfig(prj, cfgname, cfg.platform)
- if kind == "dependencies" or canlink(cfg, prjcfg) then
+ if kind == "dependencies" or canlink(cfg, prjcfg) and premake.projectdoeslink(prj, cfgname, cfg.platform) then
  if (part == "directory") then
  item = path.rebase(prjcfg.linktarget.directory, prjcfg.location, cfg.location)
  elseif (part == "basename") then
@@ -393,6 +393,23 @@
  end
 
 
+--
+-- Checks if the project has something to link
+--
+
+ function premake.projectdoeslink(prj, cfgname, platform)
+ local prjcfg = premake.getconfig(prj, cfgname, platform)
+ local lnkobj = table.icontains(table.translate(prjcfg.files, path.issourcefile), true)
+ local lnkdep = false
+ if prj.kind ~= 'StaticLib' then
+ lnkdep = table.icontains(table.translate(prjcfg.links, function(lnk)
+ local link = premake.findproject(lnk)
+ return premake.projectdoeslink(link, cfgname, platform)
+ end), true)
+ end
+ return lnkobj or lnkdep
+ end
+
 
 --
 -- Gets the name style for a configuration, indicating what kind of prefix,