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20 Frequent Autoconf Questions, with answers

Several questions about Autoconf come up occasionally. Here some of them are addressed.

• Distributing configure Scripts
• Why Require GNU M4?
• How Can I Bootstrap?
• Why Not Imake?
• How Do I #define Installation Directories?
• What is autom4te.cache?
• Header Present But Cannot Be Compiled
• Expanded Before Required
• Debugging configure scripts