[Bug 2142889] [NEW] FTBFS with glibc 2.43 due to ISO C23 const return types

[Simon Poirier]

Public bug reported:

Our last archive rebuild against glibc 2.43 flagged this package as likely
FTBFS if rebuilt on glibc2.43, due to new C23 const qualifiers.

Here's a failing build log:
https://launchpadlibrarian.net/849520809/buildlog_ubuntu-resolute-amd64.edk2_2025.11-3ubuntu3_BUILDING.txt.gz

gcc  -c  -I .. -I ../Include/Common -I ../Include/ -I ../Include/IndustryStandard -I ../Common/ -I .. -I . -I ../../../../MdePkg/Include/X64/ -I ../../../../MdePkg/Include -MD -fshort-wchar -fno-strict-aliasing -fwrapv -fno-delete-null-pointer-checks -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation -Wno-restrict -Wno-unused-result -nostdlib -g -O2  EfiRom.c -o EfiRom.o
EfiRom.c: In function ‘main’:
EfiRom.c:78:17: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
   78 |       if ((Ptr0 = strstr ((CONST CHAR8 *) mOptions.FileList->FileName, DEFAULT_OUTPUT_EXTENSION)) != NULL) {
      |                 ^
gcc  -c  -I .. -I ../Include/Common -I ../Include/ -I ../Include/IndustryStandard -I ../Common/ -I .. -I . -I ../../../../MdePkg/Include/X64/ -I ../../../../MdePkg/Include -MD -fshort-wchar -fno-strict-aliasing -fwrapv -fno-delete-null-pointer-checks -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation -Wno-restrict -Wno-unused-result -nostdlib -g -O2  GenFvInternalLib.c -o GenFvInternalLib.o
gcc -o ../bin/GenFfs  GenFfs.o -L../libs -lCommon
make[5]: Leaving directory '/<<PKGBUILDDIR>>/BaseTools/Source/C/GenFfs'
make -C GenFw
make[5]: Entering directory '/<<PKGBUILDDIR>>/BaseTools/Source/C/GenFw'
cc1: all warnings being treated as errors
make[5]: *** [../Makefiles/footer.makefile:21: EfiRom.o] Error 1

** Affects: edk2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: ftbfs

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https://bugs.launchpad.net/bugs/2142889

Title:
  FTBFS with glibc 2.43 due to ISO C23 const return types

Status in edk2 package in Ubuntu:
  New

Bug description:
  Our last archive rebuild against glibc 2.43 flagged this package as likely
  FTBFS if rebuilt on glibc2.43, due to new C23 const qualifiers.

  Here's a failing build log:
  https://launchpadlibrarian.net/849520809/buildlog_ubuntu-resolute-amd64.edk2_2025.11-3ubuntu3_BUILDING.txt.gz

  gcc  -c  -I .. -I ../Include/Common -I ../Include/ -I ../Include/IndustryStandard -I ../Common/ -I .. -I . -I ../../../../MdePkg/Include/X64/ -I ../../../../MdePkg/Include -MD -fshort-wchar -fno-strict-aliasing -fwrapv -fno-delete-null-pointer-checks -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation -Wno-restrict -Wno-unused-result -nostdlib -g -O2  EfiRom.c -o EfiRom.o
  EfiRom.c: In function ‘main’:
  EfiRom.c:78:17: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
     78 |       if ((Ptr0 = strstr ((CONST CHAR8 *) mOptions.FileList->FileName, DEFAULT_OUTPUT_EXTENSION)) != NULL) {
        |                 ^
  gcc  -c  -I .. -I ../Include/Common -I ../Include/ -I ../Include/IndustryStandard -I ../Common/ -I .. -I . -I ../../../../MdePkg/Include/X64/ -I ../../../../MdePkg/Include -MD -fshort-wchar -fno-strict-aliasing -fwrapv -fno-delete-null-pointer-checks -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation -Wno-restrict -Wno-unused-result -nostdlib -g -O2  GenFvInternalLib.c -o GenFvInternalLib.o
  gcc -o ../bin/GenFfs  GenFfs.o -L../libs -lCommon
  make[5]: Leaving directory '/<<PKGBUILDDIR>>/BaseTools/Source/C/GenFfs'
  make -C GenFw
  make[5]: Entering directory '/<<PKGBUILDDIR>>/BaseTools/Source/C/GenFw'
  cc1: all warnings being treated as errors
  make[5]: *** [../Makefiles/footer.makefile:21: EfiRom.o] Error 1

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