Date: Sun, 25 Mar 2018 22:50:18 -0600 From: Gary Aitken <freebsd@dreamchaser.org> To: FreeBSD Mailing List <freebsd-ports@freebsd.org> Subject: .if and Makefile issues Message-ID: <85769c6d-a71a-f2c6-8a65-ac9b82f534ab@dreamchaser.org>
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Bewildered and frustrated, looking for some guidance on a seemingly
simple task: check the existence of a file and rename it.
Looking at a number of examples in the Porter's guide, I should be
able to do something like this:
post-build:
<ht>echo "***** post-build *****"
#<ht>Avoid executable name conflict with dcraw port
<ht>.if exists ${WRKSRC}/dcraw
<ht>echo ===== dcraw exists =====
<ht>mv ${WRKSRC}/dcraw ${WRKSRC}/${PORTNAME}-dcraw
<ht>.else
<ht>echo ===== dcraw does not exist =====
<ht>.endif
That causes:
echo "***** post-build *****"
***** post-build *****
.if exists /usr/ports/graphics/ufraw-devel/work/ufraw-6d3259a/dcraw
make[1]: exec(.if) failed (No such file or directory)
*** Error code 1
I then tried adding parens:
post-build:
<ht>echo "***** post-build *****"
#<ht>Avoid executable name conflict with dcraw port
<ht>.if exists(${WRKSRC}/dcraw)
<ht>echo "===== dcraw exists ====="
<ht>mv ${WRKSRC}/dcraw ${WRKSRC}/${PORTNAME}-dcraw
<ht>.else
<ht>echo "===== dcraw does not exist ====="
<ht>.endif
echo "***** post-build *****"
***** post-build *****
.if exists(/usr/ports/graphics/ufraw-devel/work/ufraw-6d3259a/dcraw)
Syntax error: "(" unexpected
*** Error code 2
I finally got this to do *something*:
post-build:
<ht>echo "***** post-build *****"
# Avoid executable name conflict with dcraw port
.if exists ${WRKSRC}/dcraw
echo ===== dcraw exists =====
mv ${WRKSRC}/dcraw ${WRKSRC}/${PORTNAME}-dcraw
.else
<ht>echo ===== dcraw does not exist =====
.endif
echo "***** post-build *****"
***** post-build *****
echo "===== dcraw does not exist ====="
===== dcraw does not exist =====
Unfortunately, the file *does* exist.
Can someone enlighten me as to what is going on in the above three
situations, to further my education?
Any hints / pointers would be much appreciated:
1. Why does the .if, .else, and .endif have to have no leading whitespace?
2. Why does it require the <ht> on the stmt after the else but not
after the .if? (Same behavior with tabs on the ones after .if)
3. Why doesn't it find the file?
4. What's a right way to do this?
# ls /usr/ports/graphics/ufraw-devel/work/ufraw-6d3259a/dcraw
/usr/ports/graphics/ufraw-devel/work/ufraw-6d3259a/dcraw
Thanks, off to sleep to try to save what little hair is left.
Gary
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