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| -rw-r--r-- | docs/uclibc.org/FAQ.html | 20 |
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diff --git a/docs/uclibc.org/FAQ.html b/docs/uclibc.org/FAQ.html index c3505a785..d129089e7 100644 --- a/docs/uclibc.org/FAQ.html +++ b/docs/uclibc.org/FAQ.html @@ -26,6 +26,8 @@ have additions to this FAQ document, we would love to add them, <li><a href="#bugs">I think I found a bug in uClibc! What should I do?!</a> <li><a href="#miscompile">My package builds fine but link fails with errors like "undefined reference to __fputc_unlocked", who do I blame?!</a> +<li><a href="#gnu_malloc">My package builds fine but link fails with errors like "undefined reference + to rpl_realloc / rpl_malloc", who do I blame?!</a> <li><a href="#job_control">Why do I keep getting "sh: can't access tty; job control turned off" errors? Why doesn't Control-C work within my shell?</a> <li><a href="#autoconf">How do I make autoconf and automake behave?</a> @@ -398,6 +400,24 @@ How could it be smaller and not suck?</a></h2> <hr /> <p> +<h2><a name="gnu_malloc">My package builds fine but link fails with errors like "undefined reference + to rpl_realloc / rpl_malloc", who do I blame?!</h2> +<p> + + This error crops up because you didn't enable MALLOC_GLIBC_COMPAT support. + Configure scripts detect whether your libc supports "GNU malloc" features by + seeing whether malloc(0) returns NULL (glibc malloc(0) will return a non NULL + pointer). uClibc defaults to malloc(0) returning NULL so autoconf will assume + malloc from your libc sucks and procede to try and compile the malloc replacement + version in the gnulib addon. However, since not many packages include gnulib, + they will fail to link with rpl_realloc / rpl_malloc errors. You could force + configure to assume working behavior by exporting the variables 'jm_cv_func_working_malloc' + (older autoconf) and 'ac_cv_func_malloc_0_nonnull' (newer autoconf) to 'yes' + before running `./configure`. + + +<hr /> +<p> <h2><a name="job_control">Why do I keep getting "sh: can't access tty; job control turned off" errors? Why doesn't Control-C work within my shell?</a></h2> <p> |