Append to variable

makefile

CFLAGS += -Wall -Wextra

Explanation

Works with both recursive and simple variables.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing Variables and assignment

Expand later when used.

Open In sheetmakefilesame section

Expand immediately at assignment time.

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Assign only if variable is not already set.

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Pass variable values when invoking make.

Open In sheetbashsame section

Override even a command-line assignment.

Open In sheetmakefilesame section

Pass a variable into the shell environment of recipe commands.

Open In sheetmakefilesame section