[This bug is NOT targeted to the upcoming trixie release]

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The
severity of this report will be raised before the forky release.

The full build log can be found at:
http://qa-logs.debian.net/2025/02/16/amd64exp/pcc_1.2.0~DEVEL+20220331-1_unstable_gccexp.log.gz
The last lines of the build log are at the end of this report.

To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++

GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS.
Other Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-15/porting_to.html

[...]
 1633 |                 printf("tymatch(%p): ", p);
      |                                 ~^      ~
      |                                  |      |
      |                                  void * P1ND * {aka struct p1node *}
./trees.c: In function ‘eprint’:
./trees.c:1994:18: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘P1ND *’ {aka ‘struct p1node *’} [-Wformat=]
 1994 |         printf("%p) %s, ", p, copst(p->n_op));
      |                 ~^         ~
      |                  |         |
      |                  void *    P1ND * {aka struct p1node *}
./trees.c:2000:36: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘struct symtab *’ [-Wformat=]
 2000 |                         printf(", %p, ", p->n_sp);
      |                                   ~^
      |                                    |
      |                                    void *
./trees.c:2009:21: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘union dimfun *’ [-Wformat=]
 2009 |         printf( ", %p, ", p->n_df);
      |                    ~^
      |                     |
      |                     void *
./trees.c: At top level:
./trees.c:2118:22: error: expected ‘;’, ‘,’ or ‘)’ before ‘true’
 2118 | andorbr(P1ND *p, int true, int false)
      |                      ^~~~
./trees.c: In function ‘rmcops’:
./trees.c:2303:17: error: implicit declaration of function ‘andorbr’ [-Wimplicit-function-declaration]
 2303 |                 andorbr(p->n_left, -1, lbl = getlab());
      |                 ^~~~~~~
./trees.c: In function ‘p1nfree’:
./trees.c:3440:41: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘P1ND *’ {aka ‘struct p1node *’} [-Wformat=]
 3440 |                 printf("freeing p1node %p\n", p);
      |                                        ~^     ~
      |                                         |     |
      |                                         |     P1ND * {aka struct p1node *}
      |                                         void *
./trees.c: In function ‘p1alloc’:
./trees.c:3461:47: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘P1ND *’ {aka ‘struct p1node *’} [-Wformat=]
 3461 |                         printf("alloc p1node %p from freelist\n", p);
      |                                              ~^                   ~
      |                                               |                   |
      |                                               void *              P1ND * {aka struct p1node *}
./trees.c:3468:39: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘P1ND *’ {aka ‘struct p1node *’} [-Wformat=]
 3468 |                 printf("alloc p1node %p from memory\n", p);
      |                                      ~^                 ~
      |                                       |                 |
      |                                       void *            P1ND * {aka struct p1node *}
./trees.c: At top level:
./trees.c:2098:1: warning: ‘fixbranch’ defined but not used [-Wunused-function]
 2098 | fixbranch(P1ND *p, int label)
      | ^~~~~~~~~
make[3]: *** [Makefile:195: trees.o] Error 1
make[3]: *** Waiting for unfinished jobs....
../../common/softfloat.c: In function ‘strtosf’:
../../common/softfloat.c:76:17: warning: ‘e’ may be used uninitialized [-Wmaybe-uninitialized]
   76 | #define LDBLPTR fpis[SF_LDOUBLE]
      |                 ^
../../common/softfloat.c:1477:9: note: in expansion of macro ‘LDBLPTR’
 1477 |         LDBLPTR->make(sfp, rv, 0, e, &m);
      |         ^~~~~~~
../../common/softfloat.c:1467:13: note: ‘e’ was declared here
 1467 |         int e;
      |             ^
make[3]: Leaving directory '/build/reproducible-path/pcc-1.2.0~DEVEL+20220331/cc/ccom'
make[2]: *** [Makefile:12: all] Error 2
make[2]: Leaving directory '/build/reproducible-path/pcc-1.2.0~DEVEL+20220331/cc'
make[1]: *** [Makefile:12: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/pcc-1.2.0~DEVEL+20220331'
dh_auto_build: error: make -j8 returned exit code 2
make: *** [debian/rules:12: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2