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Mention whitespace in script expressions

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Inside an output section statement, ld's parser can't tell whether a
line
    .+=4;
is an assignment to dot or a file named ".+=4".

	* ld.texi (expressions): Mention need for whitespace.
This commit is contained in:
Alan Modra
2021-08-11 15:17:48 +09:30
parent d86d1fc7f9
commit fb0afe4cca
1 changed files with 5 additions and 3 deletions

8
ld/ld.texi

@ -6286,9 +6286,11 @@ expect when you upgrade.
@cindex expressions @cindex expressions
@cindex arithmetic @cindex arithmetic
The syntax for expressions in the linker script language is identical to The syntax for expressions in the linker script language is identical to
that of C expressions. All expressions are evaluated as integers. All that of C expressions, except that whitespace is required in some
expressions are evaluated in the same size, which is 32 bits if both the places to resolve syntactic ambiguities. All expressions are
host and target are 32 bits, and is otherwise 64 bits. evaluated as integers. All expressions are evaluated in the same
size, which is 32 bits if both the host and target are 32 bits, and is
otherwise 64 bits.
You can use and set symbol values in expressions. You can use and set symbol values in expressions.