diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e32944c81a..e08f04143c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,13 +20,13 @@ jobs:
           - os: ubuntu-22.04
             cxx: "clang++-15"
             link: "dynamic"
-            optimization: "debug"
+            optimization: "size"
             assert: "debug"
             coverage: "nocov"
             boost: "--build-boost"
             icu: ""
             cc: "clang-15"
-            flags: "-Og -fPIE"
+            flags: "-Os -fPIE"
             options: "--enable-isystem --enable-avx2 --enable-sse4"
             packager: "apt"
             packages: ""
@@ -62,14 +62,14 @@ jobs:
           - os: ubuntu-22.04
             cxx: "g++-11"
             link: "static"
-            optimization: "size"
+            optimization: "debug"
             assert: "ndebug"
             coverage: "cov"
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "gcc-11"
-            flags: "-Os -g --coverage -fPIE"
-            options: "--enable-isystem"
+            flags: "-Og -g --coverage -fPIE"
+            options: "--enable-isystem --enable-avx512"
             packager: "apt"
             packages: "lcov"
 
@@ -113,7 +113,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Prepare toolchain [generic]
         run: |
@@ -134,7 +134,7 @@ jobs:
         shell: bash
         run: |
           WORKSPACE_SUBPATH="${GITHUB_WORKSPACE%libbitcoin-system}"
-          echo "LIBBITCOIN_SRC_PATH=${WORKSPACE_SUBPATH}" >> $GITHUB_ENV
+          echo "LIBBITCOIN_SRC_PATH=$WORKSPACE_SUBPATH" >> $GITHUB_ENV
           if [[ ${{ matrix.assert }} == 'ndebug' ]]; then
             echo "ASSERT_NDEBUG=--enable-ndebug" >> $GITHUB_ENV
           else
@@ -146,7 +146,7 @@ jobs:
             echo "LINKAGE=--disable-shared" >> $GITHUB_ENV
           fi
           if [[ ${{ matrix.link }} == 'dynamic' ]]; then
-            echo "LDFLAGS=-Wl,-rpath,${WORKSPACE_SUBPATH}prefix/lib" >> $GITHUB_ENV
+            echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/lib" >> $GITHUB_ENV
           fi
 
       - name: Display Compiler details
@@ -243,13 +243,13 @@ jobs:
           - os: ubuntu-22.04
             cxx: "clang++-15"
             link: "dynamic"
-            optimization: "debug"
+            optimization: "size"
             assert: "debug"
             coverage: "nocov"
             boost: "--build-boost"
             icu: ""
             cc: "clang-15"
-            flags: "-Og -fPIE"
+            flags: "-Os -fPIE"
             options: "-Denable-avx2=on -Denable-sse4=on"
             packager: "apt"
             packages: ""
@@ -285,14 +285,14 @@ jobs:
           - os: ubuntu-22.04
             cxx: "g++-11"
             link: "static"
-            optimization: "size"
+            optimization: "debug"
             assert: "ndebug"
             coverage: "nocov"
             boost: "--build-boost"
             icu: "--build-icu --with-icu"
             cc: "gcc-11"
-            flags: "-Os -fPIE"
-            options: ""
+            flags: "-Og -fPIE"
+            options: "-Denable-avx512=on"
             packager: "apt"
             packages: ""
 
@@ -336,7 +336,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Prepare toolchain [generic]
         run: |
@@ -357,7 +357,7 @@ jobs:
         shell: bash
         run: |
           WORKSPACE_SUBPATH="${GITHUB_WORKSPACE%libbitcoin-system}"
-          echo "LIBBITCOIN_SRC_PATH=${WORKSPACE_SUBPATH}" >> $GITHUB_ENV
+          echo "LIBBITCOIN_SRC_PATH=$WORKSPACE_SUBPATH" >> $GITHUB_ENV
           if [[ ${{ matrix.packager }} == 'brew' ]]; then
             echo "CMAKE_LIBRARY_PATH=/usr/local/lib" >> $GITHUB_ENV
           fi
@@ -372,7 +372,7 @@ jobs:
             echo "LINKAGE=--disable-shared" >> $GITHUB_ENV
           fi
           if [[ ${{ matrix.link }} == 'dynamic' ]]; then
-            echo "LDFLAGS=-Wl,-rpath,${WORKSPACE_SUBPATH}prefix/lib" >> $GITHUB_ENV
+            echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/lib" >> $GITHUB_ENV
           fi
 
       - name: Display Compiler details
@@ -480,13 +480,13 @@ jobs:
             preset: "nix-gnu-debug-shared-without_icu"
             cxx: "clang++-15"
             link: "dynamic"
-            optimization: "debug"
+            optimization: "size"
             assert: "debug"
             coverage: "nocov"
             boost: "--build-boost"
             icu: ""
             cc: "clang-15"
-            flags: "-Og -fPIE"
+            flags: "-Os -fPIE"
             options: "-Denable-avx2=on -Denable-sse4=on"
             packager: "apt"
             packages: ""
@@ -533,7 +533,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Prepare toolchain [generic]
         run: |
@@ -554,7 +554,7 @@ jobs:
         shell: bash
         run: |
           WORKSPACE_SUBPATH="${GITHUB_WORKSPACE%libbitcoin-system}"
-          echo "LIBBITCOIN_SRC_PATH=${WORKSPACE_SUBPATH}" >> $GITHUB_ENV
+          echo "LIBBITCOIN_SRC_PATH=$WORKSPACE_SUBPATH" >> $GITHUB_ENV
           if [[ ${{ matrix.packager }} == 'brew' ]]; then
             echo "CMAKE_LIBRARY_PATH=/usr/local/lib" >> $GITHUB_ENV
           fi
@@ -569,7 +569,7 @@ jobs:
             echo "LINKAGE=--disable-shared" >> $GITHUB_ENV
           fi
           if [[ ${{ matrix.link }} == 'dynamic' ]]; then
-            echo "LDFLAGS=-Wl,-rpath,${WORKSPACE_SUBPATH}prefix/${{ matrix.preset }}/lib" >> $GITHUB_ENV
+            echo "LDFLAGS=-Wl,-rpath,$WORKSPACE_SUBPATH/prefix/${{ matrix.preset }}/lib" >> $GITHUB_ENV
           fi
 
       - name: Display Compiler details
@@ -706,7 +706,7 @@ jobs:
           msbuild-architecture: x64
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v3
 
       - name: Initialize SDK
         shell: powershell
diff --git a/builds/cmake/CMakeLists.txt b/builds/cmake/CMakeLists.txt
index 7aeff4b5bb..20876439c1 100644
--- a/builds/cmake/CMakeLists.txt
+++ b/builds/cmake/CMakeLists.txt
@@ -7,7 +7,7 @@
 
 # libbitcoin-system project configuration.
 #------------------------------------------------------------------------------
-cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
 
 project(libbitcoin-system LANGUAGES C CXX)
 
@@ -18,7 +18,6 @@ include(CheckIncludeFiles)
 include(CheckSymbolExists)
 include(CheckCXXCompilerFlag)
 include(CheckCXXSourceCompiles)
-include(CheckLinkerFlag)
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
@@ -98,14 +97,6 @@ else()
     message( FATAL_ERROR "Compiler does not support -Wno-deprecated-copy" )
 endif()
 
-# Suppress warning for ignored attributes (arising on template arguments).
-check_cxx_compiler_flag( "-Wno-ignored-attributes" HAS_FLAG_WNO-IGNORED-ATTRIBUTES )
-if ( HAS_FLAG_WNO-IGNORED-ATTRIBUTES )
-    add_compile_options( "-Wno-ignored-attributes" )
-else()
-    message( FATAL_ERROR "Compiler does not support -Wno-ignored-attributes" )
-endif()
-
 # Allow use of C99 'long long' type.
 check_cxx_compiler_flag( "-Wno-long-long" HAS_FLAG_WNO-LONG-LONG )
 if ( HAS_FLAG_WNO-LONG-LONG )
@@ -335,7 +326,11 @@ set( boost_system_LIBS "-lboost_system" )
 set( boost_thread_LIBS "-lboost_thread" )
 set( boost_unit_test_framework_LIBS "-lboost_unit_test_framework" )
 
-set( Boost_LIBRARY_DIR $<IF:$<BOOL:${enable-ndebug}>,"${Boost_LIBRARY_DIR_RELEASE}","${Boost_LIBRARY_DIR_DEBUG}">)
+if (enable-ndebug)
+    set( Boost_LIBRARY_DIR "${Boost_LIBRARY_DIR_DEBUG}" )
+else ()
+    set( Boost_LIBRARY_DIR "${Boost_LIBRARY_DIR_RELEASE}" )
+endif()
 
 set( boost_CPPFLAGS "-I${Boost_INCLUDE_DIR}" )
 set( boost_LDFLAGS "-L${Boost_LIBRARY_DIR}" )
@@ -378,92 +373,81 @@ endif()
 #------------------------------------------------------------------------------
 find_package( Secp256K1 0.1.0.20 REQUIRED )
 
-# Define project common includes for build.
-#------------------------------------------------------------------------------
-if (BUILD_SHARED_LIBS)
-    set( icu_i18n_FOR_BUILD_INCLUDE_DIRS ${icu_i18n_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_INCLUDE_DIRS ${secp256k1_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-else()
-    set( icu_i18n_FOR_BUILD_INCLUDE_DIRS ${icu_i18n_STATIC_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_INCLUDE_DIRS ${secp256k1_STATIC_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-endif()
-
 # Define project common includes directories
 #------------------------------------------------------------------------------
-include_directories( SYSTEM
-    ${Boost_INCLUDE_DIR}
-    ${pthread_INCLUDE_DIRS}
-    ${rt_INCLUDE_DIRS}
-    ${icu_i18n_FOR_BUILD_INCLUDE_DIRS}
-    ${dl_INCLUDE_DIRS}
-    ${secp256k1_FOR_BUILD_INCLUDE_DIRS} )
-
-# Define project common library directories for build.
-#------------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-    set( icu_i18n_FOR_BUILD_LIBRARY_DIRS ${icu_i18n_LIBRARY_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARY_DIRS ${secp256k1_LIBRARY_DIRS} CACHE STRING "Placeholder" )
+    include_directories( SYSTEM
+        ${Boost_INCLUDE_DIR}
+        ${pthread_INCLUDE_DIRS}
+        ${rt_INCLUDE_DIRS}
+        ${icu_i18n_INCLUDE_DIRS}
+        ${dl_INCLUDE_DIRS}
+        ${secp256k1_INCLUDE_DIRS} )
 else()
-    set( icu_i18n_FOR_BUILD_LIBRARY_DIRS ${icu_i18n_STATIC_LIBRARY_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARY_DIRS ${secp256k1_STATIC_LIBRARY_DIRS} CACHE STRING "Placeholder" )
+    include_directories( SYSTEM
+        ${Boost_INCLUDE_DIR}
+        ${pthread_INCLUDE_DIRS}
+        ${rt_INCLUDE_DIRS}
+        ${icu_i18n_STATIC_INCLUDE_DIRS}
+        ${dl_INCLUDE_DIRS}
+        ${secp256k1_STATIC_INCLUDE_DIRS} )
 endif()
 
 # Define project common library directories
 #------------------------------------------------------------------------------
-link_directories(
-    ${Boost_LIBRARY_DIRS}
-    ${pthread_LIBRARY_DIRS}
-    ${rt_LIBRARY_DIRS}
-    ${icu_i18n_FOR_BUILD_LIBRARY_DIRS}
-    ${dl_LIBRARY_DIRS}
-    ${secp256k1_FOR_BUILD_LIBRARY_DIRS} )
-
-# Define project common linker flags.
-#------------------------------------------------------------------------------
-check_linker_flag(CXX "-no_fixup_chains" "no_fixup_chains_FOUND")
-
-if (no_fixup_chains_FOUND)
-    add_link_options("-no_fixup_chains")
-endif()
-
-check_linker_flag(CXX "-fstack-protector" "fstack_protector_FOUND")
-
-if (fstack_protector_FOUND)
-    add_link_options("-fstack-protector")
-endif()
-
-check_linker_flag(CXX "-fstack-protector-all" "fstack_protector_all_FOUND")
-
-if (fstack_protector_all_FOUND)
-    add_link_options("-fstack-protector-all")
+if (BUILD_SHARED_LIBS)
+    link_directories(
+        ${Boost_LIBRARY_DIRS}
+        ${pthread_LIBRARY_DIRS}
+        ${rt_LIBRARY_DIRS}
+        ${icu_i18n_LIBRARY_DIRS}
+        ${dl_LIBRARY_DIRS}
+        ${secp256k1_LIBRARY_DIRS} )
+else()
+    link_directories(
+        ${Boost_LIBRARY_DIRS}
+        ${pthread_LIBRARY_DIRS}
+        ${rt_LIBRARY_DIRS}
+        ${icu_i18n_STATIC_LIBRARY_DIRS}
+        ${dl_LIBRARY_DIRS}
+        ${secp256k1_STATIC_LIBRARY_DIRS} )
 endif()
 
-
-# Define common library usage for build.
+# Define project common libraries/linker flags.
 #------------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-    set( icu_i18n_FOR_BUILD_LIBRARIES ${icu_i18n_LIBRARIES} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARIES ${secp256k1_LIBRARIES} CACHE STRING "Placeholder" )
+    link_libraries(
+        "-fstack-protector"
+        "-fstack-protector-all"
+        ${Boost_CHRONO_LIBRARY}
+        ${Boost_IOSTREAMS_LIBRARY}
+        ${Boost_JSON_LIBRARY}
+        ${Boost_LOCALE_LIBRARY}
+        ${Boost_PROGRAM_OPTIONS_LIBRARY}
+        ${Boost_SYSTEM_LIBRARY}
+        ${Boost_THREAD_LIBRARY}
+        ${pthread_LIBRARIES}
+        ${rt_LIBRARIES}
+        ${icu_i18n_LIBRARIES}
+        ${dl_LIBRARIES}
+        ${secp256k1_LIBRARIES} )
 else()
-    set( icu_i18n_FOR_BUILD_LIBRARIES ${icu_i18n_STATIC_LIBRARIES} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARIES ${secp256k1_STATIC_LIBRARIES} CACHE STRING "Placeholder" )
-endif()
-
-# Define project common libraries.
-#------------------------------------------------------------------------------
-link_libraries(
-    ${Boost_CHRONO_LIBRARY}
-    ${Boost_IOSTREAMS_LIBRARY}
-    ${Boost_JSON_LIBRARY}
-    ${Boost_LOCALE_LIBRARY}
-    ${Boost_PROGRAM_OPTIONS_LIBRARY}
-    ${Boost_SYSTEM_LIBRARY}
-    ${Boost_THREAD_LIBRARY}
-    ${pthread_LIBRARIES}
-    ${rt_LIBRARIES}
-    ${icu_i18n_FOR_BUILD_LIBRARIES}
-    ${dl_LIBRARIES}
-    ${secp256k1_FOR_BUILD_LIBRARIES} )
+    link_libraries(
+        "-fstack-protector"
+        "-fstack-protector-all"
+        ${Boost_CHRONO_LIBRARY}
+        ${Boost_IOSTREAMS_LIBRARY}
+        ${Boost_JSON_LIBRARY}
+        ${Boost_LOCALE_LIBRARY}
+        ${Boost_PROGRAM_OPTIONS_LIBRARY}
+        ${Boost_SYSTEM_LIBRARY}
+        ${Boost_THREAD_LIBRARY}
+        ${pthread_LIBRARIES}
+        ${rt_LIBRARIES}
+        ${icu_i18n_STATIC_LIBRARIES}
+        ${dl_LIBRARIES}
+        ${secp256k1_STATIC_LIBRARIES} )
+endif()
 
 add_definitions(
     ${icu} )
@@ -614,56 +598,63 @@ add_library( ${CANONICAL_LIB_NAME}
     "../../src/words/catalogs/electrum_v1.cpp"
     "../../src/words/catalogs/mnemonic.cpp" )
 
-# ${CANONICAL_LIB_NAME} project specific include directory normalization for build.
+# ${CANONICAL_LIB_NAME} project specific include directories.
 #------------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-    set( icu_i18n_FOR_BUILD_INCLUDE_DIRS ${icu_i18n_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_INCLUDE_DIRS ${secp256k1_INCLUDE_DIRS} CACHE STRING "Placeholder" )
+    target_include_directories( ${CANONICAL_LIB_NAME} PRIVATE
+        "../../include"
+        ${Boost_INCLUDE_DIR}
+        ${pthread_INCLUDE_DIRS}
+        ${rt_INCLUDE_DIRS}
+        ${icu_i18n_INCLUDE_DIRS}
+        ${dl_INCLUDE_DIRS}
+        ${secp256k1_INCLUDE_DIRS} )
 else()
-    set( icu_i18n_FOR_BUILD_INCLUDE_DIRS ${icu_i18n_STATIC_INCLUDE_DIRS} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_INCLUDE_DIRS ${secp256k1_STATIC_INCLUDE_DIRS} CACHE STRING "Placeholder" )
+    target_include_directories( ${CANONICAL_LIB_NAME} PRIVATE
+        "../../include"
+        ${Boost_INCLUDE_DIR}
+        ${pthread_INCLUDE_DIRS}
+        ${rt_INCLUDE_DIRS}
+        ${icu_i18n_STATIC_INCLUDE_DIRS}
+        ${dl_INCLUDE_DIRS}
+        ${secp256k1_STATIC_INCLUDE_DIRS} )
 endif()
 
-# ${CANONICAL_LIB_NAME} project specific include directories.
-#------------------------------------------------------------------------------
-target_include_directories( ${CANONICAL_LIB_NAME} PRIVATE
-    "../../include"
-    ${Boost_INCLUDE_DIR}
-    ${pthread_INCLUDE_DIRS}
-    ${rt_INCLUDE_DIRS}
-    ${icu_i18n_FOR_BUILD_INCLUDE_DIRS}
-    ${dl_INCLUDE_DIRS}
-    ${secp256k1_FOR_BUILD_INCLUDE_DIRS} )
-
 target_include_directories( ${CANONICAL_LIB_NAME} PUBLIC
 "../../include" )
 
-# ${CANONICAL_LIB_NAME} project specific libraries noramalization for build.
+# ${CANONICAL_LIB_NAME} project specific libraries/linker flags.
 #------------------------------------------------------------------------------
 if (BUILD_SHARED_LIBS)
-    set( icu_i18n_FOR_BUILD_LIBRARIES ${icu_i18n_LIBRARIES} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARIES ${secp256k1_LIBRARIES} CACHE STRING "Placeholder" )
+    target_link_libraries( ${CANONICAL_LIB_NAME}
+        ${Boost_CHRONO_LIBRARY}
+        ${Boost_IOSTREAMS_LIBRARY}
+        ${Boost_JSON_LIBRARY}
+        ${Boost_LOCALE_LIBRARY}
+        ${Boost_PROGRAM_OPTIONS_LIBRARY}
+        ${Boost_SYSTEM_LIBRARY}
+        ${Boost_THREAD_LIBRARY}
+        ${pthread_LIBRARIES}
+        ${rt_LIBRARIES}
+        ${icu_i18n_LIBRARIES}
+        ${dl_LIBRARIES}
+        ${secp256k1_LIBRARIES} )
 else()
-    set( icu_i18n_FOR_BUILD_LIBRARIES ${icu_i18n_STATIC_LIBRARIES} CACHE STRING "Placeholder" )
-    set( secp256k1_FOR_BUILD_LIBRARIES ${secp256k1_STATIC_LIBRARIES} CACHE STRING "Placeholder" )
+    target_link_libraries( ${CANONICAL_LIB_NAME}
+        ${Boost_CHRONO_LIBRARY}
+        ${Boost_IOSTREAMS_LIBRARY}
+        ${Boost_JSON_LIBRARY}
+        ${Boost_LOCALE_LIBRARY}
+        ${Boost_PROGRAM_OPTIONS_LIBRARY}
+        ${Boost_SYSTEM_LIBRARY}
+        ${Boost_THREAD_LIBRARY}
+        ${pthread_LIBRARIES}
+        ${rt_LIBRARIES}
+        ${icu_i18n_STATIC_LIBRARIES}
+        ${dl_LIBRARIES}
+        ${secp256k1_STATIC_LIBRARIES} )
 endif()
 
-# ${CANONICAL_LIB_NAME} project specific libraries/linker flags.
-#------------------------------------------------------------------------------
-target_link_libraries( ${CANONICAL_LIB_NAME}
-    ${Boost_CHRONO_LIBRARY}
-    ${Boost_IOSTREAMS_LIBRARY}
-    ${Boost_JSON_LIBRARY}
-    ${Boost_LOCALE_LIBRARY}
-    ${Boost_PROGRAM_OPTIONS_LIBRARY}
-    ${Boost_SYSTEM_LIBRARY}
-    ${Boost_THREAD_LIBRARY}
-    ${pthread_LIBRARIES}
-    ${rt_LIBRARIES}
-    ${icu_i18n_FOR_BUILD_LIBRARIES}
-    ${dl_LIBRARIES}
-    ${secp256k1_FOR_BUILD_LIBRARIES} )
-
 # Define libbitcoin-system-examples project.
 #------------------------------------------------------------------------------
 if (with-examples)
diff --git a/configure.ac b/configure.ac
index d0ee1cf59d..6b40067ebe 100644
--- a/configure.ac
+++ b/configure.ac
@@ -249,24 +249,12 @@ AS_CASE([${CC}], [*],
     [AX_CHECK_COMPILE_FLAG([-Wno-deprecated-copy],
         [CXXFLAGS="$CXXFLAGS -Wno-deprecated-copy"])])
 
-# Suppress warning for ignored attributes (arising on template arguments).
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_COMPILE_FLAG([-Wno-ignored-attributes],
-        [CXXFLAGS="$CXXFLAGS -Wno-ignored-attributes"])])
-
 # Conflict in stdlib under clang. Enabled in clang only.
 #------------------------------------------------------------------------------
 AS_CASE([${CC}], [*clang*],
     [AX_CHECK_COMPILE_FLAG([-Wno-mismatched-tags],
         [CXXFLAGS="$CXXFLAGS -Wno-mismatched-tags"])])
 
-# Address -undefined dynamic_lookup MacOS error.
-#------------------------------------------------------------------------------
-AS_CASE([${CC}], [*],
-    [AX_CHECK_LINK_FLAG([-no_fixup_chains],
-        [LDFLAGS="$LDFLAGS -no_fixup_chains"])])
-
 # Protect stack.
 #------------------------------------------------------------------------------
 AS_CASE([${CC}], [*],