Revert "[CompilerSupportLibraries_jll] Add libssp for more platforms (J…

…uliaLang#48027)"

This reverts commit 0f2665f.

stdlib/CompilerSupportLibraries_jll/src/CompilerSupportLibraries_jll.jl

@@ -43,15 +43,11 @@ elseif Sys.isapple()
     const libgfortran = string("@rpath/", "libgfortran.", libgfortran_version(HostPlatform()).major, ".dylib")
     const libstdcxx = "@rpath/libstdc++.6.dylib"
     const libgomp = "@rpath/libgomp.1.dylib"
-    const libssp = "@rpath/libssp.0.dylib"
 else
     const libgcc_s = "libgcc_s.so.1"
     const libgfortran = string("libgfortran.so.", libgfortran_version(HostPlatform()).major)
     const libstdcxx = "libstdc++.so.6"
     const libgomp = "libgomp.so.1"
-    if libc(HostPlatform()) != "musl"
-        const libssp = "libssp.so.0"
-    end
 end
 
 function __init__()
@@ -63,7 +59,7 @@ function __init__()
     global libstdcxx_path = dlpath(libstdcxx_handle)
     global libgomp_handle = dlopen(libgomp)
     global libgomp_path = dlpath(libgomp_handle)
-    @static if libc(HostPlatform()) != "musl"
+    if Sys.iswindows()
         global libssp_handle = dlopen(libssp)
         global libssp_path = dlpath(libssp_handle)
     end

stdlib/CompilerSupportLibraries_jll/test/runtests.jl

@@ -1,13 +1,13 @@
 # This file is a part of Julia. License is MIT: https://julialang.org/license
 
-using Test, CompilerSupportLibraries_jll, Base.BinaryPlatforms
+using Test, CompilerSupportLibraries_jll
 
 @testset "CompilerSupportLibraries_jll" begin
     @test isfile(CompilerSupportLibraries_jll.libgcc_s_path)
     @test isfile(CompilerSupportLibraries_jll.libgfortran_path)
     @test isfile(CompilerSupportLibraries_jll.libstdcxx_path)
     @test isfile(CompilerSupportLibraries_jll.libgomp_path)
-    if libc(HostPlatform()) != "musl"
+    if Sys.iswindows()
         @test isfile(CompilerSupportLibraries_jll.libssp_path)
     end
 end