Add pthread support

The forthcoming async code needs to use pthread thread local variables. This
updates the various Configurations to add the necessary flags. In many cases
this is an educated guess as I don't have access to most of these
environments! There is likely to be some tweaking needed.
Reviewed-by: NKurt Roeckx <kurt@openssl.org>

Configurations/10-main.conf

@@ -46,7 +46,7 @@
         cflags           => "-march=pentium -Wall -DL_ENDIAN -DOPENSSL_NO_INLINE_ASM",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3 -fomit-frame-pointer",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-lsocket -lnsl -ldl",
         bn_ops           => "BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}",
         dso_scheme       => "dlfcn",
@@ -69,7 +69,7 @@
         cflags           => "-m64 -Wall -DL_ENDIAN",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-lsocket -lnsl -ldl",
         bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL",
         perlasm_scheme   => "elf",
@@ -88,7 +88,7 @@
         debug_cflags     => "-g",
         release_cflags   => "-xO5 -xregs=frameptr -xdepend -xbuiltin",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-lsocket -lnsl -ldl",
+        lflags           => "-lsocket -lnsl -ldl -mt -lpthread",
         bn_ops           => "BN_LLONG RC4_CHAR RC4_CHUNK DES_PTR DES_UNROLL BF_PTR",
         dso_scheme       => "dlfcn",
         shared_target    => "solaris-shared",
@@ -103,7 +103,7 @@
         debug_cflags     => "-g",
         release_cflags   => "-xO5 -xdepend -xbuiltin",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-lsocket -lnsl -ldl",
+        lflags           => "-lsocket -lnsl -ldl -mt -lpthread",
         bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_UNROLL",
         perlasm_scheme   => "elf",
         dso_scheme       => "dlfcn",
@@ -120,7 +120,7 @@
         cflags           => "-Wall -DB_ENDIAN -DBN_DIV2W",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-lsocket -lnsl -ldl",
         bn_ops           => "BN_LLONG RC4_CHAR RC4_CHUNK DES_UNROLL BF_PTR",
         dso_scheme       => "dlfcn",
@@ -161,7 +161,7 @@
         debug_cflags     => "-g -DBN_DEBUG -DREF_CHECK -DCONF_DEBUG -DBN_CTX_DEBUG -DCRYPTO_MDEBUG_ALL",
         release_cflags   => "-xO5 -xdepend",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-lsocket -lnsl -ldl",
+        lflags           => "-lsocket -lnsl -ldl -mt -lpthread",
         bn_ops           => "BN_LLONG RC4_CHAR RC4_CHUNK DES_PTR DES_RISC1 DES_UNROLL BF_PTR",
         dso_scheme       => "dlfcn",
         shared_target    => "solaris-shared",
@@ -223,7 +223,7 @@
         cflags           => "-mabi=n32 -DB_ENDIAN -DBN_DIV3W",
         debug_cflags     => "-g -O0",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_SGI_MP_SOURCE",
+        thread_cflag     => "-D_SGI_MP_SOURCE -pthread",
         bn_ops           => "MD2_CHAR RC4_INDEX RC4_CHAR RC4_CHUNK_LL DES_UNROLL DES_RISC2 DES_PTR BF_PTR SIXTY_FOUR_BIT",
         perlasm_scheme   => "n32",
         dso_scheme       => "dlfcn",
@@ -239,6 +239,7 @@
         debug_cflags     => "-g -O0",
         release_cflags   => "-O2",
         thread_cflag     => "-D_SGI_MP_SOURCE",
+        lflags           => "-lpthread",
         bn_ops           => "DES_PTR RC4_CHAR RC4_CHUNK_LL DES_RISC2 DES_UNROLL BF_PTR SIXTY_FOUR_BIT",
         perlasm_scheme   => "n32",
         dso_scheme       => "dlfcn",
@@ -270,6 +271,7 @@
         debug_cflags     => "-g -O0",
         release_cflags   => "-O2",
         thread_cflag     => "-D_SGI_MP_SOURCE",
+        lflags           => "-lpthread",
         bn_ops           => "RC4_CHAR RC4_CHUNK DES_RISC2 DES_UNROLL SIXTY_FOUR_BIT_LONG",
         perlasm_scheme   => "64",
         dso_scheme       => "dlfcn",
@@ -312,7 +314,7 @@
         cflags           => "-DB_ENDIAN -DBN_DIV2W",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-Wl,+s -ldld",
         bn_ops           => "BN_LLONG DES_PTR DES_UNROLL DES_RISC1",
         dso_scheme       => "dl",
@@ -352,7 +354,7 @@
         debug_cflags      => "+O0 +d -g",
         release_cflags   => "+O3",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-Wl,+s -ldld",
+        lflags           => "-Wl,+s -ldld -lpthread",
         bn_ops           => "MD2_CHAR RC4_INDEX RC4_CHAR DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dl",
         shared_target    => "hpux-shared",
@@ -372,7 +374,7 @@
         debug_cflags      => "+O0 +d -g",
         release_cflags   => "+O3",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-ldl",
+        lflags           => "-ldl -lpthread",
         bn_ops           => "SIXTY_FOUR_BIT_LONG MD2_CHAR RC4_INDEX RC4_CHAR DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dlfcn",
         shared_target    => "hpux-shared",
@@ -390,7 +392,7 @@
         debug_cflags     => "+O0 +d -g",
         release_cflags   => "+O2",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-ldl",
+        lflags           => "-ldl -lpthread",
         bn_ops           => "SIXTY_FOUR_BIT MD2_CHAR RC4_INDEX DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dlfcn",
         shared_target    => "hpux-shared",
@@ -408,7 +410,7 @@
         debug_cflags     => "+O0 +d -g",
         release_cflags   => "+O3",
         thread_cflag     => "-D_REENTRANT",
-        lflags           => "-ldl",
+        lflags           => "-ldl -lpthread",
         bn_ops           => "SIXTY_FOUR_BIT_LONG MD2_CHAR RC4_INDEX DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dlfcn",
         shared_target    => "hpux-shared",
@@ -424,7 +426,7 @@
         cflags           => "-DB_ENDIAN",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-ldl",
         bn_ops           => "SIXTY_FOUR_BIT MD2_CHAR RC4_INDEX DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dlfcn",
@@ -440,7 +442,7 @@
         cflags           => "-mlp64 -DB_ENDIAN",
         debug_cflags     => "-O0 -g",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-ldl",
         bn_ops           => "SIXTY_FOUR_BIT_LONG MD2_CHAR RC4_INDEX DES_UNROLL DES_RISC1 DES_INT",
         dso_scheme       => "dlfcn",
@@ -512,7 +514,7 @@
         cflags           => "-Wall",
         debug_cflags     => "-O0 -g -DBN_DEBUG -DREF_CHECK -DCONF_DEBUG -DCRYPTO_MDEBUG",
         release_cflags   => "-O3",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-ldl",
         bn_ops           => "BN_LLONG RC4_CHAR RC4_CHUNK DES_INT DES_UNROLL BF_PTR",
         dso_scheme       => "dlfcn",
@@ -667,7 +669,6 @@
     "linux64-s390x" => {
         inherit_from     => [ "linux-generic64", asm("s390x_asm") ],
         cflags           => "-m64 -Wall -DB_ENDIAN",
-        thread_cflag     => "-D_REENTRANT",
         perlasm_scheme   => "64",
         shared_ldflag    => "-m64",
         multilib         => "64",
@@ -1420,7 +1421,7 @@
         inherit_from     => [ asm("x86_elf_asm") ],
         cc               => "gcc",
         cflags           => "-DL_ENDIAN -O3 -fomit-frame-pointer -march=i486 -Wall",
-        thread_cflag     => "-D_REENTRANT",
+        thread_cflag     => "-pthread",
         lflags           => "-ldl",
         bn_ops           => "BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}",
         dso_scheme       => "dlfcn",