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Re: [PATCH 2/2] Makefile: work around ksh's failure to handle missing list argument to for loop

From
Raja R Harinath <harinath@hurrynot.org>
Date
Jul 3, 2010, 06:21 UTC
Message-ID
<87d3v56q6o.fsf@hariville.hurrynot.org>
In-Reply-To
<8YdP-GcDDflOVZnykNVIGceOm01bqeg9PDvdgIfgqUnh29RKC-6Qi8_KBVoqLIt5iyt7g1TX5l96M5KyLrfOqg@cipher.nrlssc.navy.mil>
Hi,
Brandon Casey <casey@nrlssc.navy.mil> writes:
Show 9 quoted lines
> ksh does not like it when the list argument is missing in a for loop.  This
> can happen when NO_CURL is set which causes REMOTE_CURL_ALIASES to be unset.
> In this case, the for loop in the Makefile expands to look like this:
>
>    for p in ; do
>
> and ksh complains like this:
>
>    /bin/ksh: syntax error at line 15 : `;' unexpected
[snip]
> -	{ test x"$(REMOTE_CURL_ALIASES)" = x || \
> -		for p in $(REMOTE_CURL_ALIASES); do \
> +	remote_curl_aliases="$(REMOTE_CURL_ALIASES)" && \
> +	for p in $$remote_curl_aliases; do \
I believe the idiom
  test x'$(foo)' = x || for p in ''$(foo); do
works equally well in this case, and is less invasive.
- Hari
Previous: Brandon CaseyNext: Michael J Gruber
Message 12 of 22 in “installation issue when building with NO_CURL=YesPlease”
  1. Paul WalkerMay 26, 2010
  2. Michael J GruberMay 26, 2010
  3. Paul WalkerMay 26, 2010
  4. Ramkumar RamachandraMay 26, 2010
  5. Paul WalkerMay 26, 2010
  6. Makefile: reenable install with NO_CURLMichael J Gruber, May 26, 2010
  7. Dirk SüsserottMay 26, 2010
  8. Bruce StephensMay 26, 2010
  9. Dirk SüsserottMay 26, 2010
  10. 1/2 Makefile: remove some unnecessary curly bracesBrandon Casey, Jul 2, 2010
  11. 2/2 Makefile: work around ksh's failure to handle missing list argument to for loopBrandon Casey, Jul 2, 2010
  12. Raja R HarinathJul 3, 2010
  13. Michael J GruberJul 4, 2010
  14. Johannes SixtJul 5, 2010
  15. Michael J GruberJul 5, 2010
  16. Johannes SixtJul 5, 2010
  17. Michael J GruberJul 5, 2010
  18. Junio C HamanoJul 5, 2010
  19. Andreas SchwabJul 5, 2010
  20. Brandon CaseyJul 5, 2010
  21. Junio C HamanoJul 6, 2010
  22. 2/2 Makefile: work around ksh's failure to handle missing list argument to for loopBrandon Casey, Jul 6, 2010

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