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-rw-r--r--README.md7
1 files changed, 7 insertions, 0 deletions
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -47,3 +47,10 @@ If the interpreter path is different than expected, use PatchELF or install a sy
Just add libgcompat.so to the DT_NEEDED entries in the ELF that you want to have the gcompat symbols available in.
Use a tool such as PatchELF for this.
+
+
+## special environment variables
+
+* `GLIBC_FAKE_VERSION` will override the result of `gnu_get_libc_version`, which currently defaults to "2.8".
+* `GLIBC_FAKE_DEBUG` will cause dlmopen and dlvsym to display the overrides they are performing, and may cause
+ additional output to stderr with other functions in the future.