I'm trying to build PDL-Graphics-PLplot 0.56 against plplot 5.9.8 for Fedora 
and running into the following:

t/plplot_library_tests.t .. 1/?
#   Failed test 'Output file x01p.svg.1 matches reference C output'
#   at t/plplot_library_tests.t line 55.

#   Failed test 'Output file x04p.svg.1 matches reference C output'
#   at t/plplot_library_tests.t line 55.
t/plplot_library_tests.t .. 91/?
#   Failed test 'Output file x21p.svg.2 matches reference C output'
#   at t/plplot_library_tests.t line 55.

#   Failed test 'Output file x21p.svg.3 matches reference C output'
#   at t/plplot_library_tests.t line 55.
t/plplot_library_tests.t .. 105/?
#   Failed test 'Output file x26p.svg.1 matches reference C output'
#   at t/plplot_library_tests.t line 55.

#   Failed test 'Output file x26p.svg.2 matches reference C output'
#   at t/plplot_library_tests.t line 55.
t/plplot_library_tests.t .. 136/?
#   Failed test 'Output file x28p.svg.2 matches reference C output'
#   at t/plplot_library_tests.t line 55.

#   Failed test 'Output file x28p.svg.3 matches reference C output'
#   at t/plplot_library_tests.t line 55.
Output file name is x31p.svg.1
t/plplot_library_tests.t .. 178/? # Looks like you failed 8 tests of 182.
t/plplot_library_tests.t .. Dubious, test returned 8 (wstat 2048, 0x800)

I can't tell any difference between x01c.svg.1 and x01p.svg.1 by eye, and diff 
only shows:

$ diff ./x01p.svg.1 ./t/ref_svg_c_output/x01c.svg.1
1010c1010
< ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal"><tspan font-family="serif" font-style="normal" 
font-weight="normal">&#x50;&#x4c;&#x70;&#x6c;&#x6f;&#x74;&#x20;&#x45;&#x78;&#x61;&#x6d;&#x70;&#x6c;&#x65;&#x20;&#x31;&#x20;&#x2d;&#x20;&#x79;&#x3d;&#x78;<tspan
 
dy="-7.785550" font-size="8">&#x32;</tspan></tspan></tspan></text>
---
 > ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal"><tspan font-family="serif" font-style="normal" 
font-weight="normal">&#x50;&#x4c;&#x70;&#x6c;&#x6f;&#x74;&#x20;&#x45;&#x78;&#x61;&#x6d;&#x70;&#x6c;&#x65;&#x20;&#x31;&#x20;&#x2d;&#x20;&#x79;&#x3d;&#x78;<tspan
 
dy="-6.733449" font-size="8">&#x32;</tspan></tspan></tspan></text>
2331c2331
< ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal">&#x28;&#x78;&#x31;&#x30;<tspan dy="-7.785550" 
font-size="8">&#x2d;&#x32;<tspan dy="7.785550" 
font-size="11">&#x29;</tspan></tspan></tspan></text>
---
 > ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal">&#x28;&#x78;&#x31;&#x30;<tspan dy="-6.733449" 
font-size="8">&#x2d;&#x32;<tspan dy="6.733449" 
font-size="11">&#x29;</tspan></tspan></tspan></text>
2360c2360
< ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal"><tspan font-family="serif" font-style="normal" 
font-weight="normal">&#x50;&#x4c;&#x70;&#x6c;&#x6f;&#x74;&#x20;&#x45;&#x78;&#x61;&#x6d;&#x70;&#x6c;&#x65;&#x20;&#x31;&#x20;&#x2d;&#x20;&#x79;&#x3d;&#x78;<tspan
 
dy="-7.785550" font-size="8">&#x32;</tspan></tspan></tspan></text>
---
 > ><tspan font-family="sans-serif" font-style="normal" 
font-weight="normal"><tspan font-family="serif" font-style="normal" 
font-weight="normal">&#x50;&#x4c;&#x70;&#x6c;&#x6f;&#x74;&#x20;&#x45;&#x78;&#x61;&#x6d;&#x70;&#x6c;&#x65;&#x20;&#x31;&#x20;&#x2d;&#x20;&#x79;&#x3d;&#x78;<tspan
 
dy="-6.733449" font-size="8">&#x32;</tspan></tspan></tspan></text>

I'm wondering if this is a fatally flawed test setup in that the C example 
comparisons are pre-generated and shipped with PDL-Graphics-PLplot.  I imagine 
some small differences between Doug's machine and mine would account for the 
discrepancy.  Does this seem correct?

-- 
Orion Poplawski
Technical Manager                     303-415-9701 x222
NWRA/CoRA Division                    FAX: 303-415-9702
3380 Mitchell Lane                  or...@cora.nwra.com
Boulder, CO 80301              http://www.cora.nwra.com

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