pkgsMusl.gcc12: backport build fix (PR106102)

Without the change gcc-12 on musl fails to build due to system headers
poisoning:

    /build/build/./prev-gcc/xg++ ... ../../gcc-13-20220626/gcc/cp/mapper-resolver.cc
        In file included from /<<NIX>>/musl-1.2.3-dev/include/pthread.h:30,
                 from /build/build/prev-x86_64-unknown-linux-musl/libstdc++-v3/include/x86_64-unknown-linux-musl/bits/gthr-default.h:35,
                 ....
                 from /build/build/prev-x86_64-unknown-linux-musl/libstdc++-v3/include/memory:77,
                 from ../../gcc-13-20220626/gcc/../libcody/cody.hh:24,
                 from ../../gcc-13-20220626/gcc/cp/../../c++tools/resolver.h:25,
                 from ../../gcc-13-20220626/gcc/cp/../../c++tools/resolver.cc:23,
                 from ../../gcc-13-20220626/gcc/cp/mapper-resolver.cc:32:
    /<<NIX>>/musl-1.2.3-dev/include/sched.h:84:7: error: attempt to use poisoned "calloc"
       84 | void *calloc(size_t, size_t);
          |       ^
    /<<NIX>>/musl-1.2.3-dev/include/sched.h:124:36: error: attempt to use poisoned "calloc"
      124 | #define CPU_ALLOC(n) ((cpu_set_t *)calloc(1,CPU_ALLOC_SIZE(n)))
          |                                    ^

The change pulls upstream fix as is.

pkgs/development/compilers/gcc/12/PR106102-musl-poison-cpp.patch

@@ -0,0 +1,52 @@
+https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=3b21c21f3f5726823e19728fdd1571a14aae0fb3
+https://gcc.gnu.org/PR106102
+--- a/gcc/cp/mapper-client.cc
++++ b/gcc/cp/mapper-client.cc
+@@ -27,6 +27,7 @@ along with GCC; see the file COPYING3.  If not see
+ #define INCLUDE_STRING
+ #define INCLUDE_VECTOR
+ #define INCLUDE_MAP
++#define INCLUDE_MEMORY
+ #include "system.h"
+ 
+ #include "line-map.h"
+--- a/gcc/cp/mapper-resolver.cc
++++ b/gcc/cp/mapper-resolver.cc
+@@ -25,6 +25,7 @@ along with GCC; see the file COPYING3.  If not see
+ #define INCLUDE_VECTOR
+ #define INCLUDE_ALGORITHM
+ #define INCLUDE_MAP
++#define INCLUDE_MEMORY
+ #include "system.h"
+ 
+ // We don't want or need to be aware of networking
+--- a/gcc/cp/module.cc
++++ b/gcc/cp/module.cc
+@@ -206,6 +206,7 @@ Classes used:
+ 
+ #define _DEFAULT_SOURCE 1 /* To get TZ field of struct tm, if available.  */
+ #include "config.h"
++#define INCLUDE_MEMORY
+ #define INCLUDE_STRING
+ #define INCLUDE_VECTOR
+ #include "system.h"
+--- a/libcc1/libcc1plugin.cc
++++ b/libcc1/libcc1plugin.cc
+@@ -31,6 +31,7 @@
+ #undef PACKAGE_TARNAME
+ #undef PACKAGE_VERSION
+ 
++#define INCLUDE_MEMORY
+ #include "gcc-plugin.h"
+ #include "system.h"
+ #include "coretypes.h"
+--- a/libcc1/libcp1plugin.cc
++++ b/libcc1/libcp1plugin.cc
+@@ -32,6 +32,7 @@
+ #undef PACKAGE_TARNAME
+ #undef PACKAGE_VERSION
+ 
++#define INCLUDE_MEMORY
+ #include "gcc-plugin.h"
+ #include "system.h"
+ #include "coretypes.h"

pkgs/development/compilers/gcc/12/PR106102-musl-poison-jit.patch

@@ -0,0 +1,67 @@
+https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=49d508065bdd36fb1a9b6aad9666b1edb5e06474
+https://gcc.gnu.org/PR106102
+--- a/gcc/jit/jit-playback.cc
++++ b/gcc/jit/jit-playback.cc
+@@ -19,6 +19,7 @@ along with GCC; see the file COPYING3.  If not see
+ <http://www.gnu.org/licenses/>.  */
+ 
+ #include "config.h"
++#define INCLUDE_PTHREAD_H
+ #include "system.h"
+ #include "coretypes.h"
+ #include "target.h"
+@@ -41,8 +42,6 @@ along with GCC; see the file COPYING3.  If not see
+ #include "diagnostic.h"
+ #include "stmt.h"
+ 
+-#include <pthread.h>
+-
+ #include "jit-playback.h"
+ #include "jit-result.h"
+ #include "jit-builtins.h"
+--- a/gcc/jit/jit-recording.cc
++++ b/gcc/jit/jit-recording.cc
+@@ -19,13 +19,13 @@ along with GCC; see the file COPYING3.  If not see
+ <http://www.gnu.org/licenses/>.  */
+ 
+ #include "config.h"
++#define INCLUDE_PTHREAD_H
+ #include "system.h"
+ #include "coretypes.h"
+ #include "tm.h"
+ #include "pretty-print.h"
+ #include "toplev.h"
+ 
+-#include <pthread.h>
+ 
+ #include "jit-builtins.h"
+ #include "jit-recording.h"
+--- a/gcc/jit/libgccjit.cc
++++ b/gcc/jit/libgccjit.cc
+@@ -19,12 +19,12 @@ along with GCC; see the file COPYING3.  If not see
+ <http://www.gnu.org/licenses/>.  */
+ 
+ #include "config.h"
++#define INCLUDE_PTHREAD_H
+ #include "system.h"
+ #include "coretypes.h"
+ #include "timevar.h"
+ #include "typed-splay-tree.h"
+ #include "cppbuiltin.h"
+-#include <pthread.h>
+ 
+ #include "libgccjit.h"
+ #include "jit-recording.h"
+--- a/gcc/system.h
++++ b/gcc/system.h
+@@ -753,6 +753,10 @@ extern int vsnprintf (char *, size_t, const char *, va_list);
+ #endif
+ #endif
+ 
++#ifdef INCLUDE_PTHREAD_H
++#include <pthread.h>
++#endif
++
+ #ifdef INCLUDE_ISL
+ #ifdef HAVE_isl
+ #include <isl/options.h>

pkgs/development/compilers/gcc/12/default.nix

@@ -69,6 +69,9 @@ let majorVersion = "12";
         ../gnat-cflags-11.patch
         ../gcc-12-gfortran-driving.patch
         ../ppc-musl.patch
+        # Backports. Should be removed with 12.2.0 release:
+        ./PR106102-musl-poison-cpp.patch
+        ./PR106102-musl-poison-jit.patch
       ] ++ optional (stdenv.isDarwin && stdenv.isAarch64) (fetchpatch {
         url = "https://github.com/fxcoudert/gcc/compare/releases/gcc-11.1.0...gcc-11.1.0-arm-20210504.diff";
         sha256 = "sha256-JqCGJAfbOxSmkNyq49aFHteK/RFsCSLQrL9mzUCnaD0=";