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| author | Denis Vlasenko <vda.linux@googlemail.com> | 2008-10-20 08:43:10 +0000 |
|---|---|---|
| committer | Denis Vlasenko <vda.linux@googlemail.com> | 2008-10-20 08:43:10 +0000 |
| commit | 078323010b5d88485748d05e512d451b876992b5 (patch) | |
| tree | e7111140dd305eeedee2c4a3cfb0c0f45fc29a34 /miscutils | |
| parent | b730474bda4a964930e8013301ace7b49a0c5726 (diff) | |
| download | busybox-078323010b5d88485748d05e512d451b876992b5.tar.gz | |
dc: conditionalize parts which require libm
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/Config.in | 8 | ||||
| -rw-r--r-- | miscutils/dc.c | 4 |
2 files changed, 12 insertions, 0 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in index 0c80ae6e9..15f677a73 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -138,6 +138,14 @@ config DC Dc is a reverse-polish desk calculator which supports unlimited precision arithmetic. +config FEATURE_DC_LIBM + bool "Enable power and exp functions (requires libm)" + default n + depends on DC + help + Enable power and exp functions. + NOTE: This will require libm to be present for linking. + config DEVFSD bool "devfsd (obsolete)" default n diff --git a/miscutils/dc.c b/miscutils/dc.c index 47ec060c8..7d5886eb2 100644 --- a/miscutils/dc.c +++ b/miscutils/dc.c @@ -53,12 +53,14 @@ static void mul(void) push(pop() * pop()); } +#if ENABLE_FEATURE_DC_LIBM static void power(void) { double topower = pop(); push(pow(pop(), topower)); } +#endif static void divide(void) { @@ -137,9 +139,11 @@ static const struct op operators[] = { {"mul", mul}, {"/", divide}, {"div", divide}, +#if ENABLE_FEATURE_DC_LIBM {"**", power}, {"exp", power}, {"pow", power}, +#endif {"%", mod}, {"mod", mod}, {"and", and}, |