diff options
Diffstat (limited to 'nuttx/libc/Kconfig')
| -rw-r--r-- | nuttx/libc/Kconfig | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/nuttx/libc/Kconfig b/nuttx/libc/Kconfig index 0ae56ac57..699b3ebb2 100644 --- a/nuttx/libc/Kconfig +++ b/nuttx/libc/Kconfig @@ -71,6 +71,54 @@ config EOL_IS_EITHER_CRLF endchoice +config LIBC_EXECFUNCS + bool "Enable exec[l|v] Support" + default n + depends on !BINFMT_DISABLE + ---help--- + Enable support for the exec[l|v] family of functions that can be + used to start other programs, terminating the current program. + Typical usage is (1) first call vfork() to create a new thread, then + (2) call exec[l|v] to replace the new thread with a program from the + file system. + + NOTE 1: This two step process start is completely unnecessary in + NuttX and is provided only for compatibily with Unix systems. These + functions are essentially just wrapper functions that (1) call the + non-standard binfmt function 'exec', and then (2) exit(0). Since + the new thread will be terminated by the exec[l|v] call, it really + served no purpose other than to suport Unix compatility. + + NOTE 2: Support for exec[l|v] is conditional because is requires + additional support for symbol tables that will not be available in + the typical system. + +if LIBC_EXECFUNCS + +config EXECFUNCS_SYMTAB + string "Symbol table used by exec[l|v]" + default "g_symtab" + ---help--- + The exec[l|v] functions are wrapper functions that (1) call the non- + standard binfmt function 'exec', and then (2) exit(0). The binfmt + function 'exec' needs to have (1) a symbol table that provides the + list of symbols exported by the base code, and (2) the number of + symbols in that table. This selection provides the name of that + symbol table. + +config EXECFUNCS_NSYMBOLS + int "Number of Symbols in the Table" + default 0 + ---help--- + The exec[l|v] functions are wrapper functions that (1) call the non- + standard binfmt function 'exec', and then (2) exit(0). The binfmt + function 'exec' needs to have (1) a symbol table that provides the + list of symbols exported by the base code, and (2) the number of + symbols in that table. This selection provides the number of + symbols in the symbol table. + +endif + config LIBC_STRERROR bool "Enable strerror" default n |