Revert "Disable shared library support when compiler links statically" (#15855)

In commit v3.4.0-rc1~18^2 (Disable shared library support when compiler
links statically, 2015-09-30) we tried to detect when the compiler is
not capable of linking shared libraries (possibly due to flags in use).
However, the approach is not robust against flags like `-nostdlib`.
Revert it for now pending another solution to the original problem.

7 files changed, 0 insertions, 23 deletions

diff --git a/Modules/CMakeCCompiler.cmake.in b/Modules/CMakeCCompiler.cmake.in
index a1bfc70..c72e338 100644
--- a/Modules/CMakeCCompiler.cmake.in
+++ b/Modules/CMakeCCompiler.cmake.in
@@ -2,7 +2,6 @@ set(CMAKE_C_COMPILER "@CMAKE_C_COMPILER@")
 set(CMAKE_C_COMPILER_ARG1 "@CMAKE_C_COMPILER_ARG1@")
 set(CMAKE_C_COMPILER_ID "@CMAKE_C_COMPILER_ID@")
 set(CMAKE_C_COMPILER_VERSION "@CMAKE_C_COMPILER_VERSION@")
-set(CMAKE_C_COMPILER_LINKS_STATICALLY "@CMAKE_C_COMPILER_LINKS_STATICALLY@")
 set(CMAKE_C_STANDARD_COMPUTED_DEFAULT "@CMAKE_C_STANDARD_COMPUTED_DEFAULT@")
 set(CMAKE_C_COMPILE_FEATURES "@CMAKE_C_COMPILE_FEATURES@")
 set(CMAKE_C90_COMPILE_FEATURES "@CMAKE_C90_COMPILE_FEATURES@")
diff --git a/Modules/CMakeCInformation.cmake b/Modules/CMakeCInformation.cmake
index 0d102a1..d2417aa 100644
--- a/Modules/CMakeCInformation.cmake
+++ b/Modules/CMakeCInformation.cmake
@@ -75,10 +75,6 @@ if(CMAKE_C_SIZEOF_DATA_PTR)
   unset(CMAKE_C_ABI_FILES)
 endif()
 
-if(CMAKE_C_COMPILER_LINKS_STATICALLY)
-  set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
-endif()
-
 # This should be included before the _INIT variables are
 # used to initialize the cache.  Since the rule variables
 # have if blocks on them, users can still define them here.
diff --git a/Modules/CMakeCXXCompiler.cmake.in b/Modules/CMakeCXXCompiler.cmake.in
index 4218a6d..52e44f6 100644
--- a/Modules/CMakeCXXCompiler.cmake.in
+++ b/Modules/CMakeCXXCompiler.cmake.in
@@ -2,7 +2,6 @@ set(CMAKE_CXX_COMPILER "@CMAKE_CXX_COMPILER@")
 set(CMAKE_CXX_COMPILER_ARG1 "@CMAKE_CXX_COMPILER_ARG1@")
 set(CMAKE_CXX_COMPILER_ID "@CMAKE_CXX_COMPILER_ID@")
 set(CMAKE_CXX_COMPILER_VERSION "@CMAKE_CXX_COMPILER_VERSION@")
-set(CMAKE_CXX_COMPILER_LINKS_STATICALLY "@CMAKE_CXX_COMPILER_LINKS_STATICALLY@")
 set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT "@CMAKE_CXX_STANDARD_COMPUTED_DEFAULT@")
 set(CMAKE_CXX_COMPILE_FEATURES "@CMAKE_CXX_COMPILE_FEATURES@")
 set(CMAKE_CXX98_COMPILE_FEATURES "@CMAKE_CXX98_COMPILE_FEATURES@")
diff --git a/Modules/CMakeCXXInformation.cmake b/Modules/CMakeCXXInformation.cmake
index dad7969..091627b 100644
--- a/Modules/CMakeCXXInformation.cmake
+++ b/Modules/CMakeCXXInformation.cmake
@@ -74,10 +74,6 @@ if(CMAKE_CXX_SIZEOF_DATA_PTR)
   unset(CMAKE_CXX_ABI_FILES)
 endif()
 
-if(CMAKE_CXX_COMPILER_LINKS_STATICALLY)
-  set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
-endif()
-
 # This should be included before the _INIT variables are
 # used to initialize the cache.  Since the rule variables
 # have if blocks on them, users can still define them here.
diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 591ecb8..df6daf3 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -106,7 +106,6 @@ function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
   set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
     PARENT_SCOPE)
   set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "${CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX}" PARENT_SCOPE)
-  set(CMAKE_${lang}_COMPILER_LINKS_STATICALLY "${CMAKE_${lang}_COMPILER_LINKS_STATICALLY}" PARENT_SCOPE)
   set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_ID "${CMAKE_${lang}_SIMULATE_ID}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_VERSION "${CMAKE_${lang}_SIMULATE_VERSION}" PARENT_SCOPE)
@@ -530,13 +529,6 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
       endif()
     endif()
 
-    if(UNIX)
-      execute_process(COMMAND file "${file}" OUTPUT_VARIABLE out ERROR_VARIABLE out)
-      if(out MATCHES "statically linked")
-        set(CMAKE_${lang}_COMPILER_LINKS_STATICALLY 1 PARENT_SCOPE)
-      endif()
-    endif()
-
     # Check if a valid compiler and platform were found.
     if(COMPILER_ID AND NOT COMPILER_ID_TWICE)
       set(CMAKE_${lang}_COMPILER_ID "${COMPILER_ID}")
diff --git a/Modules/CMakeFortranCompiler.cmake.in b/Modules/CMakeFortranCompiler.cmake.in
index 6b984e5..14fdd60 100644
--- a/Modules/CMakeFortranCompiler.cmake.in
+++ b/Modules/CMakeFortranCompiler.cmake.in
@@ -2,7 +2,6 @@ set(CMAKE_Fortran_COMPILER "@CMAKE_Fortran_COMPILER@")
 set(CMAKE_Fortran_COMPILER_ARG1 "@CMAKE_Fortran_COMPILER_ARG1@")
 set(CMAKE_Fortran_COMPILER_ID "@CMAKE_Fortran_COMPILER_ID@")
 set(CMAKE_Fortran_COMPILER_VERSION "@CMAKE_Fortran_COMPILER_VERSION@")
-set(CMAKE_Fortran_COMPILER_LINKS_STATICALLY "@CMAKE_Fortran_COMPILER_LINKS_STATICALLY@")
 set(CMAKE_Fortran_PLATFORM_ID "@CMAKE_Fortran_PLATFORM_ID@")
 set(CMAKE_Fortran_SIMULATE_ID "@CMAKE_Fortran_SIMULATE_ID@")
 set(CMAKE_Fortran_SIMULATE_VERSION "@CMAKE_Fortran_SIMULATE_VERSION@")
diff --git a/Modules/CMakeFortranInformation.cmake b/Modules/CMakeFortranInformation.cmake
index aa48df7..79393d3 100644
--- a/Modules/CMakeFortranInformation.cmake
+++ b/Modules/CMakeFortranInformation.cmake
@@ -51,10 +51,6 @@ if(CMAKE_Fortran_SIZEOF_DATA_PTR)
   unset(CMAKE_Fortran_ABI_FILES)
 endif()
 
-if(CMAKE_Fortran_COMPILER_LINKS_STATICALLY)
-  set_property(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS FALSE)
-endif()
-
 # This should be included before the _INIT variables are
 # used to initialize the cache.  Since the rule variables
 # have if blocks on them, users can still define them here.