svn commit: r317681 - head/share/man/man7

[Konstantin Belousov]

On Wed, May 03, 2017 at 04:41:52AM +1000, Bruce Evans wrote:
> It would be good to mention that the type of time_t is signed somewhere.
> There is a whole column for the signedess of char in another table.
> Signedness can be given consisely using some markup like -8 or 8- for
> signed.  The scale (often bytes or bits) could be given similarly.  E.g,
> 8-B could mean signed 8 bits and 80.b could mean 80 bits floating pint.
> 
> The Page Size table says "Page Sizes" redundantly in 1 column but doesn't
> gives units, and depends on everyone knowing that 4K is real K and bytes.
I added a note at the very beginning, saying that sizes are in bytes.
For time_t, I added a short narration besides the table data.

> 
> The Floating Point table already doesn't say "sizeof()" in the header but
[omited, I do not want to change the scope of the fix]

diff --git a/share/man/man7/arch.7 b/share/man/man7/arch.7
index 1ce397a303e..ad1abccc2e5 100644
--- a/share/man/man7/arch.7
+++ b/share/man/man7/arch.7
@@ -37,6 +37,8 @@ Differences between CPU architectures and platforms supported by
 .Fx .
 .Pp
 .Ss Type sizes
+If not explicitely mentioned, sizes are in bytes.
+.Pp
 On all supported architectures,
 .Bl -column -offset -indent "long long" "Size"
 .It Sy Type Ta Sy Size
@@ -47,8 +49,10 @@ On all supported architectures,
 .It float Ta 4
 .It double Ta 8
 .El
-.Bl -column -offset indent "Sy Architecture" "Sy sizeof(void *)" "Sy sizeof(long double)" "Sy sizeof(time_t)"
-.It Sy Architecture Ta Sy sizeof(void *) Ta Sy sizeof(long double) Ta Sy sizeof(time_t)
+.Pp
+Machine-dependent type sizes:
+.Bl -column -offset indent "Sy Architecture" "Sy void *" "Sy long double" "Sy time_t"
+.It Sy Architecture Ta Sy void * Ta Sy long double Ta Sy time_t
 .It amd64       Ta 8 Ta 16 Ta 8
 .It arm         Ta 4 Ta  8 Ta 8
 .It armeb       Ta 4 Ta  8 Ta 8
@@ -69,6 +73,9 @@ On all supported architectures,
 .It riscv       Ta 8 Ta 16 Ta 8
 .It sparc64     Ta 8 Ta 16 Ta 8
 .El
+.Pp
+.Sy time_t
+is always signed, it is 64-bits everywere except on i386 and 32-bit powerpc.
 .Ss Endianness and Char Signedness
 .Bl -column -offset indent "Sy Architecture" "Sy Endianness" "Sy char Signedness"
 .It Sy Architecture Ta Sy Endianness Ta Sy char Signedness