libfabric 2.0.0 fails to build with gcc 15

[opoplawski]

Describe the bug
Fedora has updated gcc to 15. libfabric fails to build with:

libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I./include -D_GNU_SOURCE -D__USE_XOPEN2K8 -DSYSCONFDIR=\"/etc\" -DRDMADIR=\"@rdmadir@\" -DPROVDLDIR=\"/usr/lib64/libfabric\" -I./prov/sockets/include -I./prov/sockets -I./prov/lpp/include -I./prov/lpp -I./prov/verbs/include -I./prov/verbs/include/linux -I./prov/verbs/src/ep_rdm -I./prov/verbs/src/ep_dgram -I./prov/efa/src/ -I./prov/efa/src/dgram/ -I./prov/efa/src/rdm/ -D__LIBUSNIC__ -DWANT_DEBUG_MSGS=0 -DHAVE_LIBNL3=1 -I/usr/include/libnl3 -I./prov/usnic/src/usnic_direct -I./prov/opx/include -I./prov/opx/include -I./prov/opx/include/linux-i386 -I./include -I./include -D_GNU_SOURCE -D__USE_XOPEN2K8 -DSYSCONFDIR=\"/etc\" -DRDMADIR=\"@rdmadir@\" -DPROVDLDIR=\"/usr/lib64/libfabric\" -I./prov/sockets/include -I./prov/sockets -I./prov/lpp/include -I./prov/lpp -D__HIP_PLATFORM_HCC__=0 -D__HIP_PLATFORM_AMD__=0 -D__HIP_DEVICE_COMPILE__=0 -DUSE_PROF_API=0 -I./prov/lnx/include -I./prov/hook/include -I./prov/hook/perf/include -I./prov/hook/hook_debug/include -I./prov/hook/hook_hmem/include -I./prov/hook/dmabuf_peer_mem/include -Wall -O2 -DNDEBUG -O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-U_FORTIFY_SOURCE,-D_FORTIFY_SOURCE=3 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -mtls-dialect=gnu2 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -c prov/opx/src/fi_opx_cq_ops_table_non_locking_8192.c  -fPIC -DPIC -o prov/opx/src/.libs/src_libfabric_la-fi_opx_cq_ops_table_non_locking_8192.o
In file included from ./prov/opx/include/rdma/opx/fi_opx_reliability.h:36,
                 from ./prov/opx/include/rdma/opx/fi_opx_domain.h:44,
                 from ./prov/opx/include/rdma/opx/fi_opx_endpoint.h:40,
                 from ./prov/opx/include/rdma/opx/fi_opx_eq.h:41,
                 from ./prov/opx/include/rdma/opx/fi_opx_cq_ops_table.h:38,
                 from prov/opx/src/fi_opx_cq_ops_table_non_locking_8192.c:33:
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:131:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  131 | OPX_COMPILE_TIME_ASSERT((FI_OPX_HFI_BTH_OPCODE_MP_EAGER_NTH == (FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ - sizeof(FI_OPX_HFI_BTH_HIGH_OPCODE_STRINGS)/sizeof(char*) + 2)), "FI_OPX_HFI_BTH_OPCODE_MP_EAGER_NTH must be first in the high opcode array, or dependent code conditionals need updated");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:132:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  132 | OPX_COMPILE_TIME_ASSERT((FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ == 0xFF), "FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ must be last in the high opcode array, or dependent code conditionals need updated");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:134:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  134 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_INJECT ^ FI_OPX_HFI_BTH_OPCODE_MSG_INJECT_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_INJECT and FI_OPX_HFI_BTH_OPCODE_MSG_INJECT_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:135:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  135 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_EAGER ^ FI_OPX_HFI_BTH_OPCODE_MSG_EAGER_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_EAGER and FI_OPX_HFI_BTH_OPCODE_MSG_EAGER_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:136:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  136 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST ^ FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST and FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:137:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  137 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS ^ FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS and FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:138:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  138 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_TAG_INJECT ^ FI_OPX_HFI_BTH_OPCODE_TAG_INJECT_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_TAG_INJECT and FI_OPX_HFI_BTH_OPCODE_TAG_INJECT_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:139:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  139 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_TAG_EAGER ^ FI_OPX_HFI_BTH_OPCODE_TAG_EAGER_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_TAG_EAGER and FI_OPX_HFI_BTH_OPCODE_TAG_EAGER_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:140:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  140 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST ^ FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST and FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:141:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  141 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS ^ FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ) == FI_OPX_HFI_BTH_OPCODE_CQ_BIT), "FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS and FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_CQ_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:143:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  143 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_INJECT ^ FI_OPX_HFI_BTH_OPCODE_TAG_INJECT) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_INJECT and FI_OPX_HFI_BTH_OPCODE_TAG_INJECT must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:144:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  144 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_INJECT_CQ ^ FI_OPX_HFI_BTH_OPCODE_TAG_INJECT_CQ) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_INJECT_CQ and FI_OPX_HFI_BTH_OPCODE_TAG_INJECT_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:145:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  145 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_EAGER ^ FI_OPX_HFI_BTH_OPCODE_TAG_EAGER) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_EAGER and FI_OPX_HFI_BTH_OPCODE_TAG_EAGER must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:146:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  146 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_EAGER_CQ ^ FI_OPX_HFI_BTH_OPCODE_TAG_EAGER_CQ) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_EAGER_CQ and FI_OPX_HFI_BTH_OPCODE_TAG_EAGER_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:147:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  147 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST ^ FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST and FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:148:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  148 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST_CQ ^ FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST_CQ) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_MP_EAGER_FIRST_CQ and FI_OPX_HFI_BTH_OPCODE_TAG_MP_EAGER_FIRST_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:149:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  149 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS ^ FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS and FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_packet.h:150:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  150 | OPX_COMPILE_TIME_ASSERT(((FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS_CQ ^ FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ) == FI_OPX_HFI_BTH_OPCODE_TAG_BIT), "FI_OPX_HFI_BTH_OPCODE_MSG_RZV_RTS_CQ and FI_OPX_HFI_BTH_OPCODE_TAG_RZV_RTS_CQ must only differ by FI_OPX_HFI_BTH_OPCODE_TAG_BIT");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_reliability.h:297:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  297 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_reliability_tx_replay, sdma_we) == FI_OPX_CACHE_LINE_SIZE,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_reliability.h:299:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  299 | OPX_COMPILE_TIME_ASSERT((offsetof(struct fi_opx_reliability_tx_replay, scb) & (FI_OPX_CACHE_LINE_SIZE - 1)) == 0,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_match.h:62:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
   62 | OPX_COMPILE_TIME_ASSERT((FI_OPX_MATCH_UE_HT_SIZE & FI_OPX_MATCH_UE_HT_MASK) == 0,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:203:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  203 | OPX_COMPILE_TIME_ASSERT(OPX_WORK_TYPE_SDMA == 0,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:340:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  340 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, inject_9B) == (FI_OPX_CACHE_LINE_SIZE * 1),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:342:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  342 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, send_9B) == (FI_OPX_CACHE_LINE_SIZE * 3),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:344:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  344 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, rzv_9B) == (FI_OPX_CACHE_LINE_SIZE * 5),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:346:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  346 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, inject_16B) == (FI_OPX_CACHE_LINE_SIZE * 7),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:348:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  348 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, send_16B) == (FI_OPX_CACHE_LINE_SIZE * 9),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:350:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  350 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, rzv_16B) == (FI_OPX_CACHE_LINE_SIZE * 11),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:352:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  352 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, av_addr) == (FI_OPX_CACHE_LINE_SIZE * 13),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:354:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  354 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, work_pending) == (FI_OPX_CACHE_LINE_SIZE * 14),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:356:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  356 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, work_pending_completion) == (FI_OPX_CACHE_LINE_SIZE * 15),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:358:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  358 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, sdma_request_queue) == (FI_OPX_CACHE_LINE_SIZE * 16),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:360:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  360 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_tx, ref_cnt) == (FI_OPX_CACHE_LINE_SIZE * 17),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:461:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  461 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_rx, queue) == FI_OPX_CACHE_LINE_SIZE,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:463:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  463 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_rx, cq_pending_ptr) == (FI_OPX_CACHE_LINE_SIZE * 3),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:465:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  465 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_rx, state) == (FI_OPX_CACHE_LINE_SIZE * 4),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:467:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  467 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep_rx, tx) == (FI_OPX_CACHE_LINE_SIZE * 5),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:586:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  586 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep, recv_cntr) == (FI_OPX_CACHE_LINE_SIZE * 2),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:588:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  588 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep, hfi) == (FI_OPX_CACHE_LINE_SIZE * 3),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:590:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  590 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep, common_info) == (FI_OPX_CACHE_LINE_SIZE * 4),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:592:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  592 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep, init_send_cntr) == (FI_OPX_CACHE_LINE_SIZE * 5),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_endpoint.h:594:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  594 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_ep, lock) == ((FI_OPX_CACHE_LINE_SIZE * 5)+52),
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hmem.h:60:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
   60 | OPX_COMPILE_TIME_ASSERT((sizeof(struct fi_opx_hmem_info) & 0x7) == 0,
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_transport.h:766:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  766 | OPX_COMPILE_TIME_ASSERT((offsetof(struct fi_opx_hfi1_dput_params, compare_iov) & 7) == 0, "compare_iov not 8-byte aligned!");
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_transport.h:815:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  815 | OPX_COMPILE_TIME_ASSERT(offsetof(struct fi_opx_hfi1_rx_rzv_rts_params, tid_info)
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_transport.h:819:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  819 | OPX_COMPILE_TIME_ASSERT(sizeof(((struct fi_opx_hfi1_rx_rzv_rts_params *)0)->dput_iov)
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_transport.h:822:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
  822 | OPX_COMPILE_TIME_ASSERT(sizeof(((struct fi_opx_hfi1_rx_rzv_rts_params *)0)->tidpairs)
      | ^~~~~~~~~~~~~~~~~~~~~~~
./prov/opx/include/rdma/opx/fi_opx.h:300:44: error: expected identifier or ‘(’ before ‘if’
  300 | #define OPX_COMPILE_TIME_ASSERT(cond, msg) if(0){switch(0){case 0:case cond:;}}
      |                                            ^~
./prov/opx/include/rdma/opx/fi_opx_hfi1_progress.h:80:1: note: in expansion of macro ‘OPX_COMPILE_TIME_ASSERT’
   80 | OPX_COMPILE_TIME_ASSERT((FI_OPX_HFI1_HDRQ_UPDATE_MASK == FI_OPX_HFI1_HDRQ_UPDATE_MASK_32) ||
      | ^~~~~~~~~~~~~~~~~~~~~~~
make[1]: *** [Makefile:27844: prov/opx/src/src_libfabric_la-fi_opx_cq_ops_table_non_locking_8192.lo] Error 1

To Reproduce
Build on Fedora 42+ with gcc 15.

[opoplawski]

This can be worked around by setting -std=gnu17 but you may want to review https://gcc.gnu.org/gcc-15/porting_to.html#c23 to bring the code up to date.