Commit5687e78

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Doc: improve commentary about providing our own definitions of M_PI.

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Original file line number	Diff line number	Diff line change
`@@ -6,6 +6,7 @@`
`6`	`6`
`7`	`7`	`#include"utils/geo_decls.h"/* for Point */`
`8`	`8`
	`9`	`+/* X/Open (XSI) requires <math.h> to provide M_PI, but core POSIX does not */`
`9`	`10`	`#ifndefM_PI`
`10`	`11`	`#defineM_PI 3.14159265358979323846`
`11`	`12`	`#endif`

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Original file line number	Diff line number	Diff line change
`@@ -68,6 +68,7 @@`
`68`	`68`	`#include"port/pg_bitutils.h"`
`69`	`69`	`#include"portability/instr_time.h"`
`70`	`70`
	`71`	`+/* X/Open (XSI) requires <math.h> to provide M_PI, but core POSIX does not */`
`71`	`72`	`#ifndefM_PI`
`72`	`73`	`#defineM_PI 3.14159265358979323846`
`73`	`74`	`#endif`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -17,8 +17,8 @@`
`17`	`17`
`18`	`18`	`#include<math.h>`
`19`	`19`
	`20`	`+/* X/Open (XSI) requires <math.h> to provide M_PI, but core POSIX does not */`
`20`	`21`	`#ifndefM_PI`
`21`		`-/* From my RH5.2 gcc math.h file - thomas 2000-04-03 */`
`22`	`22`	`#defineM_PI 3.14159265358979323846`
`23`	`23`	`#endif`
`24`	`24`

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