ifeq conditional

makefile

ifeq ($(ENV),prod)
  API_URL := https://api.example.com
else
  API_URL := https://api.dev.example.com
endif

Explanation

GNU make conditionals run during parsing, not execution.

Learn the surrounding workflow

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

Same sheet · prioritizing Includes and conditionals

Check whether a variable is defined.

Open In sheetmakefilesame section

Branch based on operating system or shell-provided variables.

Open In sheetmakefilesame section

Read another file while parsing.

Open In sheetmakefilesame section

Ignore missing include files.

Open In sheetmakefilesame section

Run make using the default makefile and first target.

Define a target, prerequisites, and recipe.