diff options
Diffstat (limited to 'scripts/versions.awk')
| -rw-r--r-- | scripts/versions.awk | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/scripts/versions.awk b/scripts/versions.awk index a7154480e3..565233e529 100644 --- a/scripts/versions.awk +++ b/scripts/versions.awk @@ -93,6 +93,26 @@ function ord(c) { printf("%s %s %s\n", actlib, sortver, $0) | sort; } +# Some targets do not set the ABI baseline for libdl. As a result, +# symbols originally in libdl need to be moved under historic symbol +# versions, without altering the baseline version for libc itself. +/^ *!libc_pre_versions/ { + libc_pre_versions_active = 1; +} + +function libc_pre_versions() { + # No local: * here, so that we do not have to update this script + # if symbols are moved into libc. The abilist files and the other + # targets (with a real GLIBC_2.0 baseline) provide testing + # coverage. + printf("\ +GLIBC_2.0 {\n\ +};\n\ +GLIBC_2.1 {\n\ +} GLIBC_2.0;\n\ +") > outfile; + return "GLIBC_2.1"; +} function closeversion(name, oldname) { printf(" local:\n *;\n") > outfile; @@ -154,7 +174,11 @@ END { oldlib = $1; real_outfile = buildroot oldlib ".map"; outfile = real_outfile "T"; - veryoldver = ""; + if ($1 == "libc" && libc_pre_versions_active) { + veryoldver = libc_pre_versions(); + } else { + veryoldver = ""; + } printf(" %s.map", oldlib); } if ($2 != oldver) { |